Vulnerability · Published Aug 13, 2025 · Assigned by f5
CVE-2025-54500HTTP/2 Vulnerability
Medium 5.3
In plain English
A medium-severity resource allocation without limits in BIG-IP from F5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 57.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| F5 | BIG-IP | 17.5.0 – before *17.1.0 – before *16.1.0 – before *15.1.0 – before * |
| F5 | BIG-IP Next | 20.3.0 – before * |
| F5 | BIG-IP Next SPK | 2.0.0 – before *1.7.0 – before * |
| F5 | BIG-IP Next CNF | 2.0.0 – before *1.1.0 – before * |
| F5 | BIG-IP Next for Kubernetes | 2.0.0 – before * |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L