BIG-IP
CVE-2023-40534: BIG-IP HTTP/2 vulnerability
When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate.
Published
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 17.1 | 17.1.0.3.0.23.4-ENG or later |
| BIG-IP 16.1 | 16.1.4.1.0.13.5-ENG or later |
| BIG-IP 13.1, 14.1, 15.1 | Not affected |
| BIG-IP Next SPK 1.6 | * or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate. 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.