CVE-2021-22985: F5 BIG-IP Application Security Manager

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

On BIG-IP APM version 16.0.x before 16.0.1.1, under certain conditions, when processing VPN traffic with APM, TMM consumes excessive memory. A malicious, authenticated VPN user may abuse this to perform a DoS attack against the APM. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Affected products

• F5 BIG-IP Application Security Manager: from 11.6.1, before 11.6.5.2 (fixed in 11.6.5.2); from 12.1.0, before 12.1.5.3 (fixed in 12.1.5.3); from 13.1.0, before 13.1.3.6 (fixed in 13.1.3.6); from 14.1.0, before 14.1.2.8 (fixed in 14.1.2.8); from 15.1.0, before 15.1.2 (fixed in 15.1.2); from 16.0.0, before 16.0.1.1 (fixed in 16.0.1.1)

Published 2021-02-12. Last modified 2026-06-17.