CVE-2025-53521: BigIP APM Vulnerability
Critical · CVSS 9.8 (CVSS 3.1)KEV known exploitedEPSS 2.3%, 83th percentilePublished Updated Assigner: f5
In CISA’s Known Exploited Vulnerabilities catalog: F5 BIG-IP Stack-Based Buffer Overflow Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
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.
Description
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-121
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
F5: BIG-IP
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- my.f5.com/manage/s/article/K000156741 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)