BIG-IP
CVE-2025-54500: HTTP/2 Vulnerability
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).
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 4.0 6.9
EPSS0.50%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
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 | * or later |
| BIG-IP 17.1 | * or later |
| BIG-IP 16.1 | * or later |
| BIG-IP 15.1 | * or later |
| BIG-IP Next 20.3 | * or later |
| BIG-IP Next SPK 2.0 | * or later |
| BIG-IP Next SPK 1.7 | * or later |
| BIG-IP Next CNF 2.0 | * or later |
| BIG-IP Next CNF 1.1 | * or later |
| BIG-IP Next for Kubernetes 2.0 | * or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 12 Oct 2026.