Active Exploitation of RCE Vulnerability in F5 BIG-IP APM Systems
ID: 5e153fff-7031-55d1-a2f0-65d68d3a1509
STIX ID: report--5e153fff-7031-55d1-a2f0-65d68d3a1509
Feed Name: ThreatCluster
Threat Score
A critical unauthenticated remote code execution vulnerability (CVE-2025-53521) in F5 BIG-IP APM with a CVSS score of 9.8 is being actively exploited; CISA added it to its Known Exploited Vulnerabilities catalog following an F5-confirmed breach attributed to a nation-state actor. Organizations using F5 BIG-IP APM are at high risk and should follow vendor and CISA guidance to mitigate exposure.
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