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CVE-2025-53521

9.3 critical KEV · due 2026-03-30 SSVC exploitation: active Analyzed
NVD · CVE.org · CISA KEV

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.

Fix

CISA KEV required action · due 2026-03-30

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Added to the catalog 2026-03-27. CISA KEV

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 9.3 · in KEV · f5NVD modified 2026-10-08 12:10

Affected (CPE criteria) 1

  • cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*

References 2