2026-013: Critical Vulnerability in F5 BIG-IP APM
F5 BIG-IP APM product has a critical vulnerability with active exploitation in the wild.
F5 has released an advisory for a critical heap-based buffer overflow vulnerability (CVE-2026-94127) in its BIG-IP APM product, with a CVSS score of 9.8. The vendor has confirmed that this vulnerability is being actively exploited in the wild, allowing unauthenticated attackers to achieve remote code execution. CERT-EU urges immediate action, including applying hotfixes and checking for signs of compromise.
AI summary of the linked source. Not reviewed by an editor. How this works
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The lesson from this incident
Full lessonA critical heap-based buffer overflow vulnerability (CVE-2026-94127) in F5 BIG-IP APM, scoring 9.8 on the CVSS scale, is being actively exploited by unauthenticated attackers to achieve remote code execution. BIG-IP APM is a widely deployed network access and authentication gateway, making it a high-value target that sits at the perimeter of many enterprise environments. The fact that exploitation is already occurring in the wild means organizations without a rapid patching process face immediate, material risk of full system compromise. This incident underscores that critical vulnerabilities in internet-facing appliances must be treated as emergencies requiring same-day response, not routine patch cycles.
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Indicators of Compromise
Extracted by AI from the linked source. Not reviewed by an editor. How this works
- cve — CVE-2026-94127
- malware — TMM SIGABRT