F5 PATCHES CRITICAL BIG-IP APM ZERO-DAY

SECURITY DESK■ 1 MIN READ

WED, SEP 23, 2026

■ AI-SUMMARIZED FROM 1 SOURCE ▸ TIMELINE

F5 has released security updates to address a critical zero-day vulnerability in BIG-IP APM that attackers are actively exploiting to achieve remote code execution.

The flaw affects F5's BIG-IP Access Policy Manager (APM) and poses significant risk to organizations using the platform for application security and access control. F5 confirmed the vulnerability is being exploited in active attacks, prompting the urgent release of patches. BIG-IP APM is widely deployed across enterprises for managing secure access to applications and networks. A successful exploit allows attackers to execute arbitrary code on affected systems, potentially granting them control over critical infrastructure. F5 recommends customers apply available patches immediately. The company has provided guidance on affected versions and mitigation steps for environments where immediate patching is not feasible. This marks another critical vulnerability in enterprise security infrastructure, following a pattern of high-impact flaws discovered in widely-used application delivery and security platforms. Organizations should prioritize testing and deployment of available fixes.

■ SOURCES

► Bleeping Computer

■ SUMMARY WRITTEN BY AI FROM THE LINKS ABOVE

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F5 PATCHES CRITICAL BIG-IP APM ZERO-DAY

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