FortiOS
CVE-2025-64157: Use of externally-controlled format string in FortiOS
A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.
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 7.6.0 to 7.6.4 | 7.6.5 or later |
| FortiOS 7.4.0 to 7.4.9 | 7.4.10 or later |
| FortiOS 7.2.0 to 7.2.11 | Upgrade past 7.2.11; see the advisory |
| FortiOS 7.0.0 to 7.0.19 | Upgrade past 7.0.19; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.