CVE-2025-21087 TMM Vulnerability

High 8.9 Published 5 Feb 2025 Updated 5 Feb 2025

Attackers can cause resource exhaustion and denial of service on F5 BIG-IP devices when specific SSL or DNSSEC profiles are enabled.

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-2025-21087?

CVE-2025-21087 is a high-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 5 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When Client or Server SSL profiles are configured on a Virtual Server, or DNSSEC signing operations are in use, undisclosed traffic can cause an increase in memory and CPU resource utilization.

Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated

Weakness: CWE-400

Which versions are affected by CVE-2025-21087?

It affects 21 products.

Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager and 15 more.

How do I fix CVE-2025-21087?

No fix has been published for CVE-2025-21087 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-2025-21087 being exploited?

There is no known exploitation of CVE-2025-21087 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-2mpq-2v9j-3j3j.