BIG-IP
CVE-2025-35995: BIG-IP PEM vulnerability
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.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| BIG-IP 17.5 | Not affected |
| BIG-IP 17.1 | 17.1.2.2 or later |
| BIG-IP 16.1 | 16.1.6 or later |
| BIG-IP 15.1 | * or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.