CVE-2025-53521

CRITICALCISA KEV

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published10/15/2025

Last Modified3/31/2026

Sourcenvd

Honeypot Sightings0

CISA KEV

VendorF5

ProductBIG-IP

Vulnerability NameF5 BIG-IP Stack-Based Buffer Overflow Vulnerability

KEV Date Added2026-03-27

Remediation Due Date2026-03-30

Ransomware UseUnknown

Affected Products

f5:big-ip_access_policy_manager

Weaknesses (CWE)

CWE-121

References

https://my.f5.com/manage/s/article/K000156741(f5sirt@f5.com)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53521(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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