CVE-2021-23031: F5 BIG-IP Advanced Web Application Firewall

Critical severity, CVSS 9.9. EPSS: 2.8% chance of exploitation in the next 30 days.

On version 16.0.x before 16.0.1.2, 15.1.x before 15.1.3, 14.1.x before 14.1.4.1, 13.1.x before 13.1.4, 12.1.x before 12.1.6, and 11.6.x before 11.6.5.3, an authenticated user may perform a privilege escalation on the BIG-IP Advanced WAF and ASM Configuration utility. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP Advanced Web Application Firewall: from 11.6.1, up to and including 11.6.5.2; from 12.1.0, up to and including 12.1.5; from 13.1.0, up to and including 13.1.3; from 14.1.0, up to and including 14.1.4; from 15.1.0, up to and including 15.1.2; from 16.0.0, up to and including 16.0.1.1
• F5 BIG-IP Application Security Manager: from 11.6.1, up to and including 11.6.5.2; from 12.1.0, up to and including 12.1.5; from 13.1.0, up to and including 13.1.3; from 14.1.0, up to and including 14.1.4; from 15.1.0, up to and including 15.1.2; from 16.0.0, up to and including 16.0.1.1

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