CVE-2026-94127: Critical Unauthenticated RCE in F5 BIG-IP APM

Overview On September 22, 2026, F5 published a security advisory for CVE-2026-94127 , a critical heap-based buffer overflow vulnerability affecting F5 BIG-IP Access Policy Manager (APM). The vulnerability has a CVSS v3.1 score of 9.8. An unauthenticated attacker with network access to an affected virtual server may be able to achieve remote code execution (RCE) by sending specifically crafted traffic.