CVE-2021-22977: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

On BIG-IP version 16.0.0-16.0.1 and 14.1.2.4-14.1.3, cooperation between malicious HTTP client code and a malicious server may cause TMM to restart and generate a core file. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Affected products

  • F5 BIG-IP Access Policy Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Advanced Firewall Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Advanced Web Application Firewall: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Analytics: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Application Acceleration Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Application Security Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Ddos Hybrid Defender: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Domain Name System: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Fraud Protection Service: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Global Traffic Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Link Controller: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Local Traffic Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP Policy Enforcement Manager: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
  • F5 BIG-IP SSL Orchestrator: from 14.1.0, before 14.1.3.1 (fixed in 14.1.3.1); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)

Published 2021-02-12. Last modified 2026-06-17.