{"id":"CVE-2025-53521","title":"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.","summary":"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":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-121"],"vendor":"f5","product":"big-ip_access_policy_manager","affected":["big-ip_access_policy_manager >= 15.1.0, < 15.1.10.8","big-ip_access_policy_manager >= 16.1.0, < 16.1.6.1","big-ip_access_policy_manager >= 17.1.0, < 17.1.3","big-ip_access_policy_manager >= 17.5.0, < 17.5.1.3"],"patched":["big-ip_access_policy_manager 17.5.1.3"],"published":"2025-10-15","updated":"2026-10-08","sourceUpdated":"2026-10-08T12:10:00.217","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-53521","references":[{"url":"https://my.f5.com/manage/s/article/K000156741","label":"f5sirt@f5.com"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild"],"epss":0.02295,"epssPercentile":0.82731,"kev":true,"kevDateAdded":"2026-03-27","kevDueDate":"2026-03-30","kevRansomware":false,"exploited":true,"ingestedAt":"2026-10-08T11:31:27.430Z","slug":"CVE-2025-53521","body":"## Overview\n\nWhen 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.\n\n## Affected\n\n- `big-ip_access_policy_manager >= 15.1.0, < 15.1.10.8`\n- `big-ip_access_policy_manager >= 16.1.0, < 16.1.6.1`\n- `big-ip_access_policy_manager >= 17.1.0, < 17.1.3`\n- `big-ip_access_policy_manager >= 17.5.0, < 17.5.1.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `big-ip_access_policy_manager 17.5.1.3`","depth":"hadal","depthScore":79,"depthScoreParts":{"impact":53.9,"likelihood":0.5,"exploitation":25,"ransomware":0},"changes":[]}