CVE-2021-23030: F5 BIG-IP Advanced Web Application Firewall

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

On BIG-IP Advanced WAF and BIG-IP ASM version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3.1, 14.1.x before 14.1.4.3, 13.1.x before 13.1.4.1, and all versions of 12.1.x, when a WebSocket profile is configured on a virtual server, undisclosed requests can cause bd to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP Advanced Web Application Firewall: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, up to and including 14.1.4; from 15.1.0, up to and including 15.1.3; from 16.0.0, up to and including 16.0.1.1
• F5 BIG-IP Application Security Manager: from 12.1.0, up to and including 12.1.6; from 13.1.0, up to and including 13.1.4; from 14.1.0, up to and including 14.1.4; from 15.1.0, up to and including 15.1.3; from 16.0.0, up to and including 16.0.1.1

Published 2021-09-14. Last modified 2026-06-17.