CVE-2025-53521

Timeline

Detection, updates, and resolution for this record.

1. Oct 15, 2025 · Catalog

   Detected

   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.

2. Mar 27, 2026 · CISA KEV

   Known exploited

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

3. Mar 30, 2026 · CISA KEV

   Remediation due

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

4. Oct 8, 2026 · Catalog

   Updated

   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.

Affected

• cpe f5/big-ip access policy managerversion unspecified
• vendor F5 BIG-IPversion unspecified

Sources

• CISA KEVCVE-2025-53521

  F5 BIG-IP APM contains a stack-based buffer overflow vulnerability that could allow a threat actor to achieve remote code execution.

  cisa.gov
• CVE.orgCVE-2025-53521

  Official CVE identifier

  cve.org
• FIRST EPSSCVE-2025-53521

  30-day exploitation probability 2.3%

  first.org
• NIST NVDCVE-2025-53521

  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.

  nvd.nist.gov

References

• CISA note · my.f5.com
• CISA note · my.f5.com
• CISA note · my.f5.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov