{"id":"CVE-2025-53521","aliases":["EUVD-2025-34630","GHSA-j3cp-7wh4-9f6c"],"status":"published","title":"BigIP APM Vulnerability","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.","severity":{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.02295,"percentile":0.83513,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-121","CWE-770"],"published":"2025-10-15T13:55:52Z","modified":"2026-10-08T12:10:00Z","kev":{"date_added":"2026-03-27","due_date":"2026-03-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2026-03-27"},{"source":"kev","since":"2026-03-27"}],"products":[{"vendor":"f5","product":"big-ip"},{"vendor":"f5","product":"big-ip_access_policy_manager"}],"references":[{"url":"https://my.f5.com/manage/s/article/K000156741","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53521"},{"url":"https://github.com/advisories/GHSA-j3cp-7wh4-9f6c"}],"sources":{"cve":[{"id":"CVE-2025-53521","title":"BigIP APM Vulnerability","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.","status":"published","published":"2025-10-15T13:55:52.694Z","modified":"2026-03-31T16:04:27.36Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:32:48.853452Z"}],"euvd":[{"id":"EUVD-2025-34630","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.","status":"published","published":"2025-10-15T13:55:52Z","modified":"2026-03-31T16:04:27Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"exploited_since":"2026-03-27","updated_at":"2026-11-02T19:25:24.891983Z"}],"ghsa":[{"id":"GHSA-j3cp-7wh4-9f6c","title":"When a BIG-IP APM Access Policy is configured on a virtual server, undisclosed traffic can cause...","description":"When a BIG-IP APM Access Policy is configured on a virtual server, undisclosed traffic can cause TMM to terminate.  \n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.","status":"published","published":"2025-10-15T15:30:28Z","modified":"2026-03-31T18:31:25Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-121","CWE-770"],"updated_at":"2026-11-02T15:06:56.438153Z"}],"kev":[{"id":"CVE-2025-53521","title":"F5 BIG-IP Stack-Based Buffer Overflow Vulnerability","description":"F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.","cwes":["CWE-121"],"kev":{"date_added":"2026-03-27","due_date":"2026-03-30","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:15.999436Z"}],"nvd":[{"id":"CVE-2025-53521","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.","status":"published","published":"2025-10-15T14:15:48.377Z","modified":"2026-10-08T12:10:00.217Z","cvss":[{"version":"4.0","score":9.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:11:38.17237Z"}]}}