CVE-2023-23555: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

On BIG-IP Virtual Edition versions 15.1x beginning in 15.1.4 to before 15.1.8 and 14.1.x beginning in 14.1.5 to before 14.1.5.3, and BIG-IP SPK beginning in 1.5.0 to before 1.6.0, when FastL4 profile is configured on a virtual server, undisclosed traffic 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 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Advanced Firewall Manager: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.0, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Analytics: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Application Acceleration Manager: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Application Security Manager: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Ddos Hybrid Defender: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Domain Name System: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Fraud Protection Service: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Link Controller: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Local Traffic Manager: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Policy Enforcement Manager: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)
  • F5 BIG-IP Service Proxy: from 1.5.0, before 1.6.0 (fixed in 1.6.0)
  • F5 BIG-IP SSL Orchestrator: from 14.1.5, before 14.1.5.3 (fixed in 14.1.5.3); from 15.1.4, before 15.1.8 (fixed in 15.1.8)

Published 2023-02-01. Last modified 2026-06-17.