# CVE-2025-53521: A F5 BIG-IP bug is being used in attacks

Status: Being used now (CISA KEV, added 2026-03-27)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is F5 BIG-IP (CVE-2025-53521) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2025-53521. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.

## Sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2025-53521

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.