Input validation error in BIG-IP APM and BIG-IP - CVE-2025-53521

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Main Vulnerability Database Vulnerabilities #VU124687

Input validation error in BIG-IP APM and BIG-IP - CVE-2025-53521

Published: March 30, 2026


Vulnerability identifier: #VU124687
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-53521
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to insufficient validation of user-supplied input within the apmd process. A remote attacker can send specially crafted traffic to the device and execute arbitrary code.


Affected software

BIG-IP APM
BIG-IP

How to mitigate CVE-2025-53521

Install updates from vendor's website.

BIG-IP APM - addressed in versions 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.3
BIG-IP - addressed in versions 15.1.10.8, 16.1.6.1, 17.1.3, 17.5.1.3

External References

Related Security Bulletins