CVE-2025-35995: F5 BIG-IP Policy Enforcement Manager

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

When a BIG-IP PEM system is licensed with URL categorization, and the URL categorization policy or an iRule with the urlcat command is enabled on a virtual server, undisclosed requests can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP Policy Enforcement Manager: from 15.1.0, before 15.1.10.7.0.4.5 (fixed in 15.1.10.7.0.4.5); from 16.1.0, before 16.1.6 (fixed in 16.1.6); from 17.1.0, before 17.1.2.2 (fixed in 17.1.2.2)

Published 2025-05-07. Last modified 2026-06-17.