CVE-2025-53521
BigIP APM Vulnerability
CVSS Score
9.8
EPSS Score
19.9%
EPSS Percentile
95th
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.
| CWE | CWE-121 |
| Vendor | f5 |
| Product | big-ip |
| Published | Oct 15, 2025 |
| Last Updated | Mar 31, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
F5 / BIG-IP
17.5.0 < 17.5.1.3 17.1.0 < 17.1.3 16.1.0 < 16.1.6.1 15.1.0 < 15.1.10.8
References
Credits
F5 would like to thank Kristian Vlaardingerbroek, Hugo Trippaers, and other people of Schuberg Philis; Bart Vrancken; Fox-IT; and the National Cyber Security Centre (NCSC) in the Netherlands for their assistance in investigating this issue and following the highest standards of coordinated disclosure.