CVE-2025-54500 HTTP/2 Vulnerability

Medium 6.9 Published 13 Aug 2025 Updated 3 Nov 2025

Attackers can cause denial of service on F5 BIG-IP devices by sending malformed HTTP/2 control frames to bypass stream limits.

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-2025-54500?

CVE-2025-54500 is a medium-severity denial of service vulnerability in F5 Big-Ip Access Policy Manager, published on 13 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An HTTP/2 implementation flaw allows a denial-of-service (DoS) that uses malformed HTTP/2 control frames in order to break the max concurrent streams limit (HTTP/2 MadeYouReset Attack).

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

Weakness: CWE-770

Which versions are affected by CVE-2025-54500?

It affects 26 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 20 more.

How do I fix CVE-2025-54500?

No fix has been published for CVE-2025-54500 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-2025-54500 being exploited?

There is no known exploitation of CVE-2025-54500 in the wild and no public exploit code.

All F5 Big-Ip Access Policy Manager vulnerabilities

Sources

Also known as GHSA-q678-fxj6-jj99.