CVE-2025-53521 — CRITICAL (9.8)

Q: How severe is CVE-2025-53521?

CVE-2025-53521 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2025-53521?

Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager.

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). Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Score

9.8

CRITICAL

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 Products

Vendor	Product	Versions
F5	Big-Ip Access Policy Manager	>= 15.1.0, < 15.1.10.8

Related Weaknesses (CWE)

CWE-121

References

https://my.f5.com/manage/s/article/K000156741Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-US Government Resource

FAQ

What is CVE-2025-53521?

CVE-2025-53521 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 Su...

How severe is CVE-2025-53521?

CVE-2025-53521 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2025-53521?

Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager.