CVE-2025-35995 BIG-IP PEM vulnerability
Attackers can cause Traffic Management Microkernel termination in BIG-IP PEM systems with URL categorization enabled, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-35995?
CVE-2025-35995 is a high-severity denial of service vulnerability in F5 Big-Ip Policy Enforcement Manager, published on 7 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-125
Which versions are affected by CVE-2025-35995?
It affects 1 product.
Products include F5 Big-Ip Policy Enforcement Manager.
How do I fix CVE-2025-35995?
No fix has been published for CVE-2025-35995 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-35995 being exploited?
There is no known exploitation of CVE-2025-35995 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Policy Enforcement Manager
Sources
Also known as GHSA-27mv-c3gh-hv8r.