CVE-2021-23013: F5 BIG-IP Access Policy Manager

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.3, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, the Traffic Management Microkernel (TMM) may stop responding when processing Stream Control Transmission Protocol (SCTP) traffic under certain conditions. This vulnerability affects TMM by way of a virtual server configured with an SCTP profile. 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, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Advanced Firewall Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Advanced Web Application Firewall: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Analytics: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Application Acceleration Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Application Security Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Ddos Hybrid Defender: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Domain Name System: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Fraud Protection Service: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Global Traffic Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Link Controller: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Local Traffic Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP Policy Enforcement Manager: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)
F5 BIG-IP SSL Orchestrator: from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.4 (fixed in 13.1.4); from 14.1.0, before 14.1.4 (fixed in 14.1.4); from 15.1.0, before 15.1.3 (fixed in 15.1.3); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)

Published 2021-05-10. Last modified 2026-06-17.