BSI issues urgent warning on F5 BIG-IP APM vulnerability
Published · Updated
What happened
The BSI warned on 2026-09-24 that a vulnerability in F5 BIG-IP APM can let unauthenticated attackers execute code on affected systems and urged operators to install available patches without delay.
Why it matters
F5 BIG-IP APM is used for remote access and traffic management in enterprise and public-sector networks. A publicly flagged flaw in that layer can lead organizations to take emergency patching steps, restrict access, or face outages if attackers move before remediation is completed.
Germany's Federal Office for Information Security (BSI) published an urgent advisory on 2026-09-24 about a vulnerability in F5 BIG-IP Access Policy Manager systems. According to the agency, the flaw can allow unauthenticated remote code execution, creating a path to system compromise, data access and service interruption if unpatched. The advisory turns a vendor security issue into an immediate operational task for German public and private operators that use the affected systems.
Watch for
BSI publication by 2026-09-28 of an updated technical advisory that changes the risk rating or confirms active exploitation in Germany F5 Networks release by 2026-09-28 of additional mitigation guidance or revised affected-version list for BIG-IP APM CERT-Bund notice by 2026-09-28 requesting incident reports tied to BIG-IP APM compromise indicators A named German critical-infrastructure operator disclosure by 2026-09-28 of emergency maintenance windows or access restrictions linked to F5 BIG-IP APM patching
Sources
- F5 · my.f5.com
- Bundesamt für Sicherheit in der Informationstechnik · bsi.bund.de
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