VULNERABILITY INTELLIGENCE

CVE-2025-53521

CVSS score8.7 HIGH
EPSS probability2.30%
CISA KEVKnown exploited vulnerability
Published2025-10-15
Last modified2026-10-08
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Known Exploited Vulnerability

F5 BIG-IP Stack-Based Buffer Overflow Vulnerability

Vendor / product: F5 / BIG-IP

Description

When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Weakness classification

  • CWE-121: Stack-based Buffer Overflow

Primary references