by Kastro
Paper/Archive/CVE-2025-53521

CVE-2025-53521

F5 BIG-IP — BigIP APM Vulnerability

KEV · due 30 MarEPSS 2%public exploitSSVC actCVSS 9.8
critical.is priorityof 100
96
CVSS 9.8 (CNA)9.8 / 10 × 3029.4In CISA KEV+3030.0EPSS percentile 83.2.832 × 2016.6Exploit: SSVC active+1010.0SSVC exploitation: active+1010.0
Description · from the CVE record

When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE).   Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected

ProductAffectedFixed inSource
BIG-IP17.5.0 – < 17.5.1.317.5.1.3CNA
BIG-IP17.1.0 – < 17.1.317.1.3CNA
BIG-IP16.1.0 – < 16.1.6.116.1.6.1CNA
BIG-IP15.1.0 – < 15.1.10.815.1.10.8CNA

Scores by source

f5 (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
f5 (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: active · Automatable: yes · Technical impact: total

References

advisorymy.f5.com/manage/s/article/K000156741refcisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521kevcisa.gov/known-exploited-vulnerabilities-catalog