Microsoft Edge Security Technical Implementation Guide
- Version/Release: V1R1
- Published: 2021-09-03
- Severity:
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This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DoD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.
b
Bypassing Microsoft Defender SmartScreen prompts for sites must be disabled.
- RMF Control
- MA-3
- Severity
- Medium
- CCI
- CCI-000870
- Version
- EDGE-00-000002
- Vuln IDs
- V-235720
- Rule IDs
- SV-235720r766832_rule
This policy setting allows a decision to be made on whether users can override the Microsoft Defender SmartScreen warnings about potentially malicious websites.
If this setting is enabled, users cannot ignore Microsoft Defender SmartScreen warnings, and are blocked from continuing to the site.
If this setting is disabled or not configured, users can ignore Microsoft Defender SmartScreen warnings and continue to the site.
Fix: F-38902r766831_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Prevent bypassing Microsoft Defender SmartScreen prompts for sites" to "Enabled".
b
Bypassing of Microsoft Defender SmartScreen warnings about downloads must be disabled.
- RMF Control
- MA-3
- Severity
- Medium
- CCI
- CCI-000870
- Version
- EDGE-00-000003
- Vuln IDs
- V-235721
- Rule IDs
- SV-235721r766835_rule
This policy setting allows a decision to be made on whether users can override Microsoft Defender SmartScreen warnings about unverified downloads.
If this setting is enabled, users cannot ignore Microsoft Defender SmartScreen warnings, and are prevented from completing the unverified downloads.
If this policy is disabled or not configured, users can ignore Microsoft Defender SmartScreen warnings and complete unverified downloads.
Fix: F-38903r766834_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Prevent bypassing of Microsoft Defender SmartScreen warnings about downloads" must to "Enabled".
b
InPrivate mode must be disabled.
- RMF Control
- AU-10
- Severity
- Medium
- CCI
- CCI-000166
- Version
- EDGE-00-000005
- Vuln IDs
- V-235723
- Rule IDs
- SV-235723r626523_rule
This setting specifies whether the user can open pages in InPrivate mode in Microsoft Edge.
If this policy is not configured or set it to "Enabled", users can open pages in InPrivate mode.
Set this policy to "Disabled" to stop users from using InPrivate mode.
Set this policy to "Forced" to always use InPrivate mode.
Policy options mapping:
- Enabled (0) = InPrivate mode available
- Disabled (1) = InPrivate mode disabled
- Forced (2) = InPrivate mode forced
Fix: F-38905r626366_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Configure InPrivate mode availability" to "enabled" and select "InPrivate mode disabled".
b
Background processing must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000006
- Vuln IDs
- V-235724
- Rule IDs
- SV-235724r766838_rule
Background processing allows Microsoft Edge processes to start at OS sign-in and keep running after the last browser window is closed. In this scenario, background apps and the current browsing session remain active, including any session cookies. An open background process displays an icon in the system tray, and can be closed from there.
If this policy is enabled, background mode is turned on.
If this policy is disabled, background mode is turned off.
If this policy is not configured, background mode is initially turned off, and the user can configure its behavior in edge://settings/system.
Fix: F-38906r766837_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Continue running background apps after Microsoft Edge closes" to "Disabled".
b
The ability of sites to show pop-ups must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000008
- Vuln IDs
- V-235725
- Rule IDs
- SV-235725r626523_rule
Set whether websites can show pop-up windows. Pop-ups can be allowed on all websites ("AllowPopups") or blocked on all sites ("BlockPopups").
If this policy is configured, pop-up windows are blocked by default, and users can change this setting.
Policy options mapping:
- AllowPopups (1) = Allow all sites to show pop-ups.
- BlockPopups (2) = Do not allow any site to show pop-ups.
Fix: F-38907r626372_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Content settings/Default pop-up window setting" to "Enabled" with the option value set to "Do not allow any site to show pop-ups".
a
Data Synchronization must be disabled.
- RMF Control
- CM-7
- Severity
- Low
- CCI
- CCI-000381
- Version
- EDGE-00-000010
- Vuln IDs
- V-235727
- Rule IDs
- SV-235727r766843_rule
Disables data synchronization in Microsoft Edge. This policy also prevents the sync consent prompt from appearing.
If this policy is not set or applied as recommended, users will be able to turn sync on or off. If this policy is applied as mandatory, users will not be able to turn on sync.
Fix: F-38909r766842_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Disable synchronization of data using Microsoft sync services" to "Enabled".
b
Network prediction must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000011
- Vuln IDs
- V-235728
- Rule IDs
- SV-235728r766845_rule
Enables network prediction and prevents users from changing this setting.
This controls DNS prefetching, TCP and SSL pre-connection, and pre-rendering of web pages.
If this policy is not configured, network prediction is enabled but the user can change it.
Policy options mapping:
- NetworkPredictionAlways (0) = Predict network actions on any network connection.
- NetworkPredictionWifiOnly (1) = Not supported; if this value is used it will be treated as if "Predict network actions on any network connection" (0) was set.
- NetworkPredictionNever (2) = Do not predict network actions on any network connection.
Fix: F-38910r626381_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable network prediction" to "Enabled" with the option value set to "Don't predict network actions on any network connection".
b
Search suggestions must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000012
- Vuln IDs
- V-235729
- Rule IDs
- SV-235729r766848_rule
Enables web search suggestions in the Microsoft Edge Address Bar and Auto-Suggest List, and prevents users from changing this policy.
If this policy is enabled, web search suggestions are used.
If this policy is disabled, web search suggestions are never used; however, local history and local favorites suggestions still appear. If this policy is disabled, neither the typed characters nor the URLs visited will be included in telemetry to Microsoft.
If this policy is not set, search suggestions are enabled but the user can change that.
Fix: F-38911r766847_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable search suggestions" to "Disabled".
b
Importing of autofill form data must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000013
- Vuln IDs
- V-235730
- Rule IDs
- SV-235730r626523_rule
Allows users to import autofill form data from another browser into Microsoft Edge.
If this policy is enabled, the option to manually import autofill data is automatically selected.
If this policy is disabled, autofill form data is not imported at first run, and users cannot import it manually.
If this policy is not configured, autofill data is imported at first run, and users can choose whether to import this data manually during later browsing sessions.
This policy cannot be set as a recommendation. This means that Microsoft Edge will import autofill data on first run, but users can select or clear autofill data option during manual import.
Fix: F-38912r626387_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of autofill form data" to "disabled".
a
Importing of browser settings must be disabled.
- RMF Control
- CM-7
- Severity
- Low
- CCI
- CCI-000381
- Version
- EDGE-00-000014
- Vuln IDs
- V-235731
- Rule IDs
- SV-235731r626523_rule
Allows users to import browser settings from another browser into Microsoft Edge.
If this policy is enabled, the Browser settings check box is automatically selected in the Import browser data dialog box.
If this policy is disabled, browser settings are not imported at first run, and users cannot import them manually.
If this policy is not configured, browser settings are imported at first run, and users can choose whether to import them manually during later browsing sessions.
Fix: F-38913r626390_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of browser settings" to "disabled".
b
Importing of cookies must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000015
- Vuln IDs
- V-235732
- Rule IDs
- SV-235732r626523_rule
Allows users to import cookies from another browser into Microsoft Edge.
If this policy is disabled, cookies are not imported on first run.
If this policy is not configured, cookies are imported on first run.
Fix: F-38914r626393_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of cookies" to "disabled".
b
Importing of extensions must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000016
- Vuln IDs
- V-235733
- Rule IDs
- SV-235733r626523_rule
Allows users to import extensions from another browser into Microsoft Edge.
If this policy is enabled, the Extensions check box is automatically selected in the Import browser data dialog box.
If this policy is disabled, extensions are not imported at first run, and users cannot import them manually.
Fix: F-38915r626396_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of extensions" to "disabled".
b
Importing of browsing history must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000017
- Vuln IDs
- V-235734
- Rule IDs
- SV-235734r626540_rule
Allows users to import their browsing history from another browser into Microsoft Edge.
If this policy is enabled, the Browsing history check box is automatically selected in the Import browser data dialog box.
If this policy is disabled, browsing history data is not imported at first run, and users cannot import this data manually.
Fix: F-38916r626539_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of browsing history" to "disabled".
b
Importing of home page settings must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000018
- Vuln IDs
- V-235735
- Rule IDs
- SV-235735r626523_rule
Allows users to import their home page setting from another browser into Microsoft Edge.
If this policy is enabled, the option to manually import the home page setting is automatically selected.
If this policy is disabled, the home page setting is not imported at first run, and users cannot import it manually.
Fix: F-38917r626402_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of home page settings" to "disabled".
b
Importing of open tabs must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000019
- Vuln IDs
- V-235736
- Rule IDs
- SV-235736r626523_rule
Allows users to import open and pinned tabs from another browser into Microsoft Edge.
If this policy is enabled, the Open tabs check box is automatically selected in the Import browser data dialog box.
If this policy is disabled, open tabs are not imported at first run, and users cannot import them manually.
If this policy is not configured, open tabs are imported at first run, and users can choose whether to import them manually during later browsing sessions.
Fix: F-38918r626405_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of open tabs" to "disabled".
b
Importing of payment info must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000020
- Vuln IDs
- V-235737
- Rule IDs
- SV-235737r626523_rule
Allows users to import payment info from another browser into Microsoft Edge.
If this policy is enabled, the payment info check box is automatically selected in the Import browser data dialog box.
If this policy is disabled, payment info is not imported at first run, and users cannot import it manually.
Fix: F-38919r626408_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of payment info" to "disabled".
b
Importing of saved passwords must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000021
- Vuln IDs
- V-235738
- Rule IDs
- SV-235738r626523_rule
Allows users to import saved passwords from another browser into Microsoft Edge.
If this policy is enabled, the option to manually import saved passwords is automatically selected.
If this policy is disabled, saved passwords are not imported on first run, and users cannot import them manually.
Fix: F-38920r626411_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of saved passwords" to "disabled".
b
Importing of search engine settings must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000022
- Vuln IDs
- V-235739
- Rule IDs
- SV-235739r626523_rule
Allows users to import search engine settings from another browser into Microsoft Edge.
If this policy is enabled, the option to import search engine settings is automatically selected.
If this policy is disabled, search engine settings are not imported at first run, and users cannot import them manually.
Fix: F-38921r626414_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of search engine settings" to "disabled".
b
Importing of shortcuts must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000023
- Vuln IDs
- V-235740
- Rule IDs
- SV-235740r626523_rule
Allows users to import Shortcuts from another browser into Microsoft Edge.
If this policy is disabled, Shortcuts are not imported on first run.
If this policy is not configured, Shortcuts are imported on first run.
Fix: F-38922r626417_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow importing of shortcuts" to "disabled".
b
Autoplay must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000024
- Vuln IDs
- V-235741
- Rule IDs
- SV-235741r626523_rule
This policy sets the media autoplay policy for websites.
The default setting, "Not configured" respects the current media autoplay settings and lets users configure their autoplay settings.
Setting to "Enabled" sets media autoplay to "Allow". All websites are allowed to autoplay media. Users cannot override this policy.
Setting to "Disabled" sets media autoplay to "Block". No websites are allowed to autoplay media. Users cannot override this policy.
Fix: F-38923r626420_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow media autoplay for websites" to "disabled".
b
WebUSB must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000025
- Vuln IDs
- V-235742
- Rule IDs
- SV-235742r626523_rule
Set whether websites can access connected USB devices. Access can be blocked completely or the user asked each time a website wants to get access to connected USB devices.
Override this policy for specific URL patterns by using the WebUsbAskForUrls and WebUsbBlockedForUrls policies.
If this policy is not configured, sites can ask users whether they can access the connected USB devices ('AskWebUsb') by default, and users can change this setting.
Fix: F-38924r626423_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Content settings/Control use of the WebUSB API" to enabled" and select "Do not allow any site to request access to USB devices via the WebUSB API".
b
Google Cast must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000026
- Vuln IDs
- V-235743
- Rule IDs
- SV-235743r626523_rule
Enable this policy to enable Google Cast. Users will be able to launch it from the app menu, page context menus, media controls on Cast-enabled websites, and (if shown) the Cast toolbar icon.
Disable this policy to disable Google Cast.
By default, Google Cast is enabled.
Fix: F-38925r626426_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Cast/Enable Google Cast" to "disabled".
b
Web Bluetooth API must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000027
- Vuln IDs
- V-235744
- Rule IDs
- SV-235744r626523_rule
Control whether websites can access nearby Bluetooth devices. Access can be blocked completely or the site required to ask the user each time it wants to access a Bluetooth device.
If this policy is not configured, the default value ('AskWebBluetooth', meaning users are asked each time) is used and users can change it.
Policy options mapping:
- BlockWebBluetooth (2) = Do not allow any site to request access to Bluetooth devices via the Web Bluetooth API.
- AskWebBluetooth (3) = Allow sites to ask the user to grant access to a nearby Bluetooth device.
Fix: F-38926r626521_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Content settings/Control use of the Web Bluetooth API" to "enabled" with the option value set to "Do not allow any site to request access to Bluetooth devices via the Web Bluetooth API.
b
Autofill for Credit Cards must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000028
- Vuln IDs
- V-235745
- Rule IDs
- SV-235745r626523_rule
Enables the Microsoft Edge AutoFill feature and lets users auto complete credit card information in web forms using previously stored information.
If this policy is disabled, AutoFill never suggests or fills credit card information, nor will it save additional credit card information that users might submit while browsing the web.
If this policy is enabled or not configured, users can control AutoFill for credit cards.
Fix: F-38927r626432_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable AutoFill for credit cards" to "disabled".
b
Autofill for addresses must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000029
- Vuln IDs
- V-235746
- Rule IDs
- SV-235746r626523_rule
Enables the AutoFill feature and allows users to auto-complete address information in web forms using previously stored information.
If this policy is disabled, AutoFill never suggests or fills credit card information, nor will it save additional credit card information that users might submit while browsing the web.
If this policy is enabled or not configured, users can control AutoFill for addresses in the user interface.
Fix: F-38928r626435_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable AutoFill for addresses" to "disabled".
b
Online revocation checks must be performed.
- RMF Control
- IA-5
- Severity
- Medium
- CCI
- CCI-000185
- Version
- EDGE-00-000030
- Vuln IDs
- V-235747
- Rule IDs
- SV-235747r766851_rule
If you enable this policy, Microsoft Edge will perform soft-fail, online OCSP/CRL checks. "Soft fail" means that if the revocation server can't be reached, the certificate will be considered valid.
If you disable the policy or don't configure it, Microsoft Edge won't perform online revocation checks.
Fix: F-38929r766850_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable online OCSP/CRL checks" to "Enabled".
b
Personalization of ads, search, and news by sending browsing history to Microsoft must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000031
- Vuln IDs
- V-235748
- Rule IDs
- SV-235748r626523_rule
This policy prevents Microsoft from collecting a user's Microsoft Edge browsing history to be used for personalizing advertising, search, news and other Microsoft services.
This setting is only available for users with a Microsoft account. This setting is not available for child accounts or enterprise accounts.
If this policy is disabled, users cannot change or override the setting. If this policy is enabled or not configured, Microsoft Edge will default to the user's preference.
Fix: F-38930r626441_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow personalization of ads, search and news by sending browsing history to Microsoft" to "disabled".
b
Site tracking of a user’s location must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000032
- Vuln IDs
- V-235749
- Rule IDs
- SV-235749r626523_rule
Set whether websites can track users' physical locations. Tracking can be allowed by default ("AllowGeolocation") or denied by default ("BlockGeolocation"), or the user can be asked each time a website requests their location ("AskGeolocation").
If this policy is not configured, "AskGeolocation" is used and the user can change it.
Policy options mapping:
- AllowGeolocation (1) = Allow sites to track users' physical location.
- BlockGeolocation (2) = Do not allow any site to track users' physical location.
- AskGeolocation (3) = Ask whenever a site wants to track users' physical location.
Fix: F-38931r626444_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Content settings/Default geolocation setting" to "enabled" and select "Don't allow any site to track users' physical location".
b
Browser history must be saved.
- RMF Control
- AU-10
- Severity
- Medium
- CCI
- CCI-000166
- Version
- EDGE-00-000033
- Vuln IDs
- V-235750
- Rule IDs
- SV-235750r626523_rule
This setting disables deleting browser history and download history and prevents users from changing this setting.
Fix: F-38932r626447_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable deleting browser and download history" to "disabled".
a
Edge development tools must be disabled.
- RMF Control
- CM-7
- Severity
- Low
- CCI
- CCI-000381
- Version
- EDGE-00-000034
- Vuln IDs
- V-235751
- Rule IDs
- SV-235751r626523_rule
While the risk associated with browser development tools is more related to the proper design of a web application, a risk vector remains within the browser. The developer tools allow end users and application developers to view and edit all types of web application-related data via the browser. Page elements, source code, javascript, API calls, application data, etc., may all be viewed and potentially manipulated. Manipulation could be useful for troubleshooting legitimate issues, and this may be performed in a development environment. Manipulation could also be malicious and must be addressed.
Fix: F-38933r626450_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Control where developer tools can be used" to "enabled" and select "Don't allow using the developer tools".
a
Download restrictions must be configured.
- RMF Control
- CM-7
- Severity
- Low
- CCI
- CCI-000381
- Version
- EDGE-00-000036
- Vuln IDs
- V-235752
- Rule IDs
- SV-235752r766854_rule
Configures the type of downloads that Microsoft Edge completely blocks, without letting users override the security decision.
Set "BlockDangerousDownloads" to allow all downloads except for those that carry Microsoft Defender SmartScreen warnings.
Set "BlockPotentiallyDangerousDownloads" to allow all downloads except for those that carry Microsoft Defender SmartScreen warnings of potentially dangerous or unwanted downloads.
Set "BlockAllDownloads" to block all downloads.
If this policy is not configured or the 'DefaultDownloadSecurity' option set, downloads go through the usual security restrictions based on Microsoft Defender SmartScreen analysis results.
Note that these restrictions apply to downloads from web page content, as well as the "download link..." context menu option. These restrictions do not apply to saving or downloading the currently displayed page, nor do they apply to the "Save as PDF" option from the printing options.
See https://go.microsoft.com/fwlink/?linkid=2094934 for more information on Microsoft Defender SmartScreen.
Policy options mapping:
- DefaultDownloadSecurity (0) = No special restrictions.
- BlockDangerousDownloads (1) = Block dangerous downloads.
- BlockPotentiallyDangerousDownloads (2) = Block potentially dangerous or unwanted downloads.
- BlockAllDownloads (3) = Block all downloads.
Fix: F-38934r766853_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow download restrictions" to "Enabled" and select "BlockDangerousDownloads" or "Block potentially dangerous or unwanted downloads".
b
Extensions installation must be blocklisted by default.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000041
- Vuln IDs
- V-235754
- Rule IDs
- SV-235754r799955_rule
List specific extensions that users cannot install in Microsoft Edge. When this policy is deployed, any extensions on this list that were previously installed will be disabled, and the user will not be able to enable them. If an item is removed from the list of blocked extensions, the extension is automatically reenabled anywhere it was previously installed.
Use "*" to block all extensions that are not explicitly listed in the allow list.
If this policy is not configured, users can install any extension in Microsoft Edge.
Fix: F-38936r766859_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Extensions/Control which extensions cannot be installed" to "Enabled". A list of blocklisted extensions may then be specified.
b
The Password Manager must be disabled.
- RMF Control
- IA-5
- Severity
- Medium
- CCI
- CCI-002007
- Version
- EDGE-00-000043
- Vuln IDs
- V-235756
- Rule IDs
- SV-235756r626523_rule
Enable Microsoft Edge to save user passwords.
If this policy is enabled, users can save their passwords in Microsoft Edge. The next time the user visits the site, Microsoft Edge will enter the password automatically.
Fix: F-38938r626465_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Password manager and protection/Enable saving passwords to the password manager" to "disabled".
c
Edge must be configured to allow only TLS.
- RMF Control
- AC-17
- Severity
- High
- CCI
- CCI-001453
- Version
- EDGE-00-000046
- Vuln IDs
- V-235759
- Rule IDs
- SV-235759r626523_rule
Sets the minimum supported version of SSL. If this policy is not configured, Microsoft Edge uses a default minimum version, TLS 1.0.
If this policy is enabled, the minimum version can be set to one of the following values: "TLSv1", "TLSv1.1" or "TLSv1.2". When set, Microsoft Edge will not use any version of SSL/TLS lower than the specified version. Any unrecognized value is ignored.
Policy options mapping:
- TLSv1 (tls1) = TLS 1.0
- TLSv1.1 (tls1.1) = TLS 1.1
- TLSv1.2 (tls1.2) = TLS 1.2
NIST SP 800-52 specifies the preferred configurations for government systems.
Fix: F-38941r626474_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Minimum TLS version enabled" to "TLS 1.2".
b
Site isolation for every site must be enabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000047
- Vuln IDs
- V-235760
- Rule IDs
- SV-235760r626523_rule
The "SitePerProcess" policy can be used to prevent users from opting out of the default behavior of isolating all sites. The "IsolateOrigins" policy can be used to isolate additional, finer-grained origins.
Enabling this policy prevents users from opting out of the default behavior where each site runs in its own process.
If this policy is not disabled or configured, a user can opt out of site isolation (e.g., by using "Disable site isolation" entry in edge://flags.) Disabling the policy or not configuring the policy does not turn off Site Isolation.
Fix: F-38942r626477_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable site isolation for every site" to "enabled".
b
Supported authentication schemes must be configured.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000382
- Version
- EDGE-00-000048
- Vuln IDs
- V-235761
- Rule IDs
- SV-235761r766865_rule
This setting specifies which HTTP authentication schemes are supported.
The policy can be configured by using these values: "basic", "digest", "ntlm", and "negotiate". Separate multiple values with commas.
If this policy is not configured, all four schemes are used.
Fix: F-38943r626480_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/HTTP authentication/Supported authentication schemes" to "ntlm,negotiate".
b
Microsoft Defender SmartScreen must be enabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000050
- Vuln IDs
- V-235763
- Rule IDs
- SV-235763r766868_rule
This policy setting configures Microsoft Defender SmartScreen, which provides warning messages to help protect users from potential phishing scams and malicious software. By default, Microsoft Defender SmartScreen is turned on.
If this setting is enabled, Microsoft Defender SmartScreen is turned on.
If this setting is disabled, Microsoft Defender SmartScreen is turned off.
If this setting is not configured, users can choose whether to use Microsoft Defender SmartScreen.
This policy is available only on Windows instances that are joined to a Microsoft Active Directory domain, Windows 10 Pro or Enterprise instances that enrolled for device management, or macOS instances that are that are managed via MDM or joined to a domain via MCX.
Fix: F-38945r766867_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Configure Microsoft Defender SmartScreen" to "Enabled".
b
Microsoft Defender SmartScreen must be configured to block potentially unwanted apps.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000051
- Vuln IDs
- V-235764
- Rule IDs
- SV-235764r766871_rule
This policy setting configures blocking for potentially unwanted apps with Microsoft Defender SmartScreen. Potentially unwanted app blocking with Microsoft Defender SmartScreen provides warning messages to help protect users from adware, coin miners, bundleware, and other low-reputation apps that are hosted by websites. Potentially unwanted app blocking with Microsoft Defender SmartScreen is turned off by default.
If this setting is enabled, potentially unwanted app blocking with Microsoft Defender SmartScreen is turned on.
If this setting is disabled, potentially unwanted app blocking with Microsoft Defender SmartScreen is turned off.
If this setting is not configured, users can choose whether to use potentially unwanted app blocking with Microsoft Defender SmartScreen.
This policy is available only on Windows instances that are joined to a Microsoft Active Directory domain, Windows 10 Pro or Enterprise instances that enrolled for device management, or macOS instances that are managed via MDM or joined to a domain via MCX.
Fix: F-38946r766870_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Configure Microsoft Defender SmartScreen to block potentially unwanted apps" to "Enabled".
a
The download location prompt must be configured.
- RMF Control
- CM-7
- Severity
- Low
- CCI
- CCI-000381
- Version
- EDGE-00-000052
- Vuln IDs
- V-235765
- Rule IDs
- SV-235765r626523_rule
This setting provides positive feedback before a download starts, limiting the possibility of inadvertent downloads without notifying the user.
Fix: F-38947r626492_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Ask where to save downloaded files" to "enabled".
b
Tracking of browsing activity must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000388
- Version
- EDGE-00-000054
- Vuln IDs
- V-235766
- Rule IDs
- SV-235766r766874_rule
The setting allows websites to be blocked from tracking users' web-browsing activity.
If this policy is disabled or is not configured, users can set their own level of tracking prevention.
Policy options mapping:
- TrackingPreventionOff (0) = Off (no tracking prevention)
- TrackingPreventionBasic (1) = Basic (blocks harmful trackers; content and ads will be personalized)
- TrackingPreventionBalanced (2) = Balanced (blocks harmful trackers and trackers from sites user has not visited; content and ads will be less personalized)
- TrackingPreventionStrict (3) = Strict (blocks harmful trackers and majority of trackers from all sites; content and ads will have minimal personalization; some parts of sites might not work)
Fix: F-38948r766873_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Block tracking of users' web-browsing activity" to "Balanced" or "Strict".
b
A website's ability to query for payment methods must be disabled.
- RMF Control
- CM-8
- Severity
- Medium
- CCI
- CCI-000389
- Version
- EDGE-00-000055
- Vuln IDs
- V-235767
- Rule IDs
- SV-235767r626523_rule
This setting determines whether websites can check if the user has payment methods saved.
If this policy is disabled, websites that use "PaymentRequest.canMakePayment" or "PaymentRequest.hasEnrolledInstrument" API will be informed that no payment methods are available.
If this policy is enabled or is not set, websites can check to determine if the user has payment methods saved.
Fix: F-38949r626498_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow websites to query for available payment methods" to "disabled".
b
Suggestions of similar web pages in the event of a navigation error must be disabled.
- RMF Control
- IA-2
- Severity
- Medium
- CCI
- CCI-000767
- Version
- EDGE-00-000056
- Vuln IDs
- V-235768
- Rule IDs
- SV-235768r766877_rule
This setting allows Microsoft Edge to issue a connection to a web service to generate URL and search suggestions for connectivity issues such as DNS errors.
If this policy is enabled, a web service is used to generate URL and search suggestions for network errors.
If this policy is disabled, no calls to the web service are made and a standard error page is shown.
If this policy is not configured, Microsoft Edge respects the user preference that is set under Services at edge://settings/privacy. Specifically, there is a "Suggest similar pages when a webpage can't be found" toggle, which the user can switch on or off.
Note that if this policy has been enabled (AlternateErrorPagesEnabled), the "Suggest similar pages when a webpage can't be found setting" is turned on, but the user cannot change the setting by using the toggle.
If this policy is disabled, the "Suggest similar pages when a webpage can't be found" setting is turned off, and the user cannot change the setting by using the toggle.
Fix: F-38950r766876_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Suggest similar pages when a webpage can't be found" to "Disabled".
b
User feedback must be disabled.
- RMF Control
- CM-8
- Severity
- Medium
- CCI
- CCI-000392
- Version
- EDGE-00-000057
- Vuln IDs
- V-235769
- Rule IDs
- SV-235769r626523_rule
Microsoft Edge uses the Edge Feedback feature (enabled by default) to allow users to send feedback, suggestions, or customer surveys and to report any issues with the browser. By default, users cannot disable (turn off) the Edge Feedback feature.
If this policy is enabled or not configured, users can invoke Edge Feedback.
If this policy is disabled, users cannot invoke Edge Feedback.
Fix: F-38951r626504_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow user feedback" to "disabled".
b
The collections feature must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000058
- Vuln IDs
- V-235770
- Rule IDs
- SV-235770r766880_rule
This setting allows users to access the Collections feature, where they can collect, organize, share, and export content more efficiently and with Office integration.
If this policy is enabled or not configured, users can access and use the Collections feature in Microsoft Edge.
If this policy is disabled, users cannot access and use Collections in Microsoft Edge.
Fix: F-38952r766879_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable the Collections feature" to "Disabled".
b
The Share Experience feature must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000059
- Vuln IDs
- V-235771
- Rule IDs
- SV-235771r626523_rule
If this policy is set to "ShareAllowed" (the default), users will be able to access the Windows 10 Share experience from the Settings and More menu in Microsoft Edge to share with other apps on the system.
If this policy is set to "ShareDisallowed", users will not be able to access the Windows 10 Share experience. If the Share button is on the toolbar, it will also be hidden.
Policy options mapping:
- ShareAllowed (0) = Allow using the Share experience.
- ShareDisallowed (1) = Do not allow using the Share experience.
Fix: F-38953r626510_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Configure the Share experience" to "Don't allow using the Share experience".
b
Guest mode must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000060
- Vuln IDs
- V-235772
- Rule IDs
- SV-235772r626523_rule
Enabling Guest mode allows the use of guest profiles in Microsoft Edge. In a guest profile, the browser does not import browsing data from existing profiles, and it deletes browsing data when all guest profiles are closed.
If this policy is enabled or not configured, Microsoft Edge lets users browse in guest profiles.
If this policy is disabled, Microsoft Edge does not let users browse in guest profiles.
Fix: F-38954r626513_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Enable guest mode" to "disabled".
b
Relaunch notification must be required.
- RMF Control
- CM-8
- Severity
- Medium
- CCI
- CCI-000396
- Version
- EDGE-00-000061
- Vuln IDs
- V-235773
- Rule IDs
- SV-235773r766882_rule
Users must be required to restart the browser to finish installation of pending updates and prevent users from continually using an old/vulnerable browser version.
Fix: F-38955r626516_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Notify a user that a browser restart is recommended or required for pending updates" web-browsing activity to "Required".
b
The built-in DNS client must be disabled.
- RMF Control
- IA-2
- Severity
- Medium
- CCI
- CCI-001942
- Version
- EDGE-00-000062
- Vuln IDs
- V-235774
- Rule IDs
- SV-235774r626523_rule
This setting controls whether to use the built-in DNS client.
This does not affect which DNS servers are used; it only controls the software stack that is used to communicate with them. For example, if the operating system is configured to use an enterprise DNS server, that same server would be used by the built-in DNS client. However, it is however possible that the built-in DNS client will address servers in different ways by using more modern DNS-related protocols such as DNS-over-TLS.
If this policy is enabled, the built-in DNS client is used if it is available.
If this policy is disabled, the client is never used.
Fix: F-38956r626519_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Use built-in DNS client" to "disabled".
b
Use of the QUIC protocol must be disabled.
- RMF Control
- CM-7
- Severity
- Medium
- CCI
- CCI-000381
- Version
- EDGE-00-000063
- Vuln IDs
- V-246736
- Rule IDs
- SV-246736r766829_rule
QUIC is used by more than half of all connections from the Edge web browser to Google's servers, and this activity is undesirable in the DoD.
If you enable this policy or don't configure it, the QUIC protocol is allowed.
If you disable this policy, the QUIC protocol is blocked.
Fix: F-50122r766828_fix
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Allow QUIC protocol" to "Disabled".