CVE-2024-21771: F5 BIG-IP Advanced Firewall Manager

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

For unspecified traffic patterns, BIG-IP AFM IPS engine may spend an excessive amount of time matching the traffic against signatures, resulting in Traffic Management Microkernel (TMM) restarting and traffic disruption.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Affected products

• F5 BIG-IP Advanced Firewall Manager: from 15.1.0, before 15.1.9 (fixed in 15.1.9); from 16.1.0, before 16.1.4 (fixed in 16.1.4); version 17.1.0 only

Published 2024-02-14. Last modified 2026-06-17.