CVE-2020-5946: F5 BIG-IP Advanced Web Application Firewall

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

In BIG-IP Advanced WAF and FPS versions 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, and 14.1.0-14.1.2.7, under some circumstances, certain format client-side alerts sent to the BIG-IP virtual server configured with DataSafe may cause the Traffic Management Microkernel (TMM) to restart, resulting in a Denial-of-Service (DoS).

Affected products

• F5 BIG-IP Advanced Web Application Firewall: from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); after 15.1.0, before 15.1.1 (fixed in 15.1.1); from 16.0.0, before 16.0.1 (fixed in 16.0.1)
• F5 BIG-IP Fraud Protection Service: from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.1 (fixed in 15.1.1); from 16.0.0, before 16.0.1 (fixed in 16.0.1)

Published 2020-11-05. Last modified 2026-06-17.