CVE-2021-23039: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.2.8, and all versions of 13.1.x and 12.1.x, when IPSec is configured on a BIG-IP system, undisclosed requests from an authorized remote (IPSec) peer, which already has a negotiated Security Association, can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

  • F5 BIG-IP Access Policy Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Advanced Firewall Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Analytics: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Application Acceleration Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Application Security Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Domain Name System: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Fraud Protection Service: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Global Traffic Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Link Controller: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Local Traffic Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)
  • F5 BIG-IP Policy Enforcement Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.2 (fixed in 16.0.1.2)

Published 2021-09-14. Last modified 2026-06-17.