CISA description
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.
CVE-2025-53521
F5 · BIG-IP
F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
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.
Notes & references
- Please adhere to F5’s guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible F5 products affected by this vulnerability. For more information please see: https://my.f5.com/manage/s/article/K000156741
- https://my.f5.com/manage/s/article/K000160486
- https://my.f5.com/manage/s/article/K11438344
- https://nvd.nist.gov/vuln/detail/CVE-2025-53521
Where this lands in 800-53
Vulnerability data triggers these controls during assessment and continuous monitoring.