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CISA adds critical F5 BIG-IP APM vulnerability CVE-2025-53521 to known exploited catalog amid active attacks

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added CVE-2025-53521, a critical remote code execution vulnerability in F5 BIG-IP Access Policy Manager (APM), to its Known Exploited Vulnerabilities (KEV) catalog following evidence of active exploitation.

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  • The Hacker News - CISA adds CVE-2025-53521 to KEV after active exploitation
    thehackernews.com
  • Help Net Security - Attackers exploiting RCE vulnerability in BIG-IP APM systems...
    helpnetsecurity.com
  • K000156741: F5 BIG-IP APM vulnerability CVE-2025-53521 - from October - K000160486: Indicators of Compromise for c05d...
    blueteamsec