CISA Known Exploited Vulnerability

CVE-2025-6543

Citrix · NetScaler ADC and Gateway

Citrix NetScaler ADC and Gateway Buffer Overflow Vulnerability

Date added
BOD 22-01 due date
CWE CWE-119
Ransomware Unknown

CISA description

Citrix NetScaler ADC and Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.