{"cve_id":"CVE-2025-53521","published":"2025-10-15T14:15:48.377000+00:00","last_modified":"2026-10-08T12:10:00.217000+00:00","vuln_status":"Analyzed","description":"When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).  \n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-121"],"in_kev":true,"kev_date_added":"2026-03-27","kev_ransomware":false,"epss_score":0.02295,"epss_percentile":0.83261,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-10-09T03:16:29.560131+00:00","first_seen":"2025-10-15T14:15:48.377000+00:00","kev_first_seen":"2026-03-27T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["f5"],"products":["big-ip_access_policy_manager"],"affected":[{"vendor":"f5","product":"big-ip_access_policy_manager","ranges":["≥ 15.1.0 and < 15.1.10.8","≥ 16.1.0 and < 16.1.6.1","≥ 17.1.0 and < 17.1.3","≥ 17.5.0 and < 17.5.1.3"]}]}