BIG-IP
CVE-2025-20045: BIG-IP SIP MRF Vulnerability
When SIP session Application Level Gateway mode (ALG) profile with Passthru Mode enabled and SIP router ALG profile are configured on a Message Routing type virtual server, undisclosed traffic can cause the Traffic Management Microkernel (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 | 17.1.2 or later |
| BIG-IP 16.1 | 16.1.5 or later |
| BIG-IP 15.1 | Hotfix-BIGIP-15.1.10.6.0.11.6-ENG.iso or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
When SIP session Application Level Gateway mode (ALG) profile with Passthru Mode enabled and SIP router ALG profile are configured on a Message Routing type virtual server, undisclosed traffic can cause the Traffic Management Microkernel (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.