CVE-2020-5946

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-11-05 · updated 2026-06-17

Description

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; from 15.1.0 (excl.) before 15.1.1; from 16.0.0 before 16.0.1 — fixed in 14.1.2.8, 15.1.1, 16.0.1
F5 Big-Ip Fraud Protection Service: from 14.1.0 before 14.1.2.8; from 15.1.0 before 15.1.1; from 16.0.0 before 16.0.1 — fixed in 14.1.2.8, 15.1.1, 16.0.1

How to fix

Upgrade to a fixed version: F5 Big-Ip Advanced Web Application Firewall 14.1.2.8, 15.1.1, 16.0.1; F5 Big-Ip Fraud Protection Service 14.1.2.8, 15.1.1, 16.0.1. Check the vendor advisory for mitigations.

References

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