FortiOS
CVE-2025-22251: Improper restriction of communication channel to intended endpoints in FortiOS
An improper restriction of communication channel to intended endpoints vulnerability [CWE-923] in FortiOS 7.6.0, 7.4.0 through 7.4.5, 7.2 all versions, 7.0 all versions, 6.4 all versions may allow an unauthenticated attacker to inject unauthorized sessions via crafted FGSP session synchronization packets.
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 |
|---|---|
| FortiOS 7.6 | 7.6.1 or later |
| FortiOS 7.4.0 to 7.4.5 | 7.4.6 or later |
| FortiOS 7.2.0 to 7.2.11 | Upgrade past 7.2.11; see the advisory |
| FortiOS 7.0.0 to 7.0.17 | Upgrade past 7.0.17; see the advisory |
| FortiOS 6.4.0 to 6.4.16 | Upgrade past 6.4.16; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An improper restriction of communication channel to intended endpoints vulnerability [CWE-923] in FortiOS 7.6.0, 7.4.0 through 7.4.5, 7.2 all versions, 7.0 all versions, 6.4 all versions may allow an unauthenticated attacker to inject unauthorized sessions via crafted FGSP session synchronization packets.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.