FortiOS
CVE-2024-26009: Authentication bypass using an alternate path or channel in FortiProxy, FortiOS and others
An authentication bypass using an alternate path or channel [CWE-288] vulnerability in Fortinet FortiOS 6.4.0 through 6.4.15, FortiOS 6.2.0 through 6.2.16, FortiOS 6.0 all versions, FortiPAM 1.2.0, FortiPAM 1.1.0 through 1.1.2, FortiPAM 1.0.0 through 1.0.3, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.15, FortiSwitchManager 7.2.0 through 7.2.3, FortiSwitchManager 7.0.0 through 7.0.3 allows an unauthenticated attacker to seize control of a managed device via crafted FGFM requests, if the device is managed by a FortiManager, and if the attacker knows that FortiManager's serial number.
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 |
|---|---|
| FortiProxy 7.4.0 to 7.4.2 | 7.4.3 or later |
| FortiProxy 7.2.0 to 7.2.8 | 7.2.9 or later |
| FortiProxy 7.0.0 to 7.0.15 | 7.0.16 or later |
| FortiOS 6.4.0 to 6.4.15 | 6.4.16 or later |
| FortiOS 6.2.0 to 6.2.16 | 6.2.17 or later |
| FortiOS 6.0.0 to 6.0.18 | Upgrade past 6.0.18; see the advisory |
| FortiPAM 1.2 | See the advisory |
| FortiPAM 1.1.0 to 1.1.2 | Upgrade past 1.1.2; see the advisory |
| FortiPAM 1.0.0 to 1.0.3 | Upgrade past 1.0.3; see the advisory |
| FortiSwitchManager 7.2.0 to 7.2.3 | 7.2.4 or later |
| FortiSwitchManager 7.0.0 to 7.0.3 | 7.0.4 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
An authentication bypass using an alternate path or channel [CWE-288] vulnerability in Fortinet FortiOS 6.4.0 through 6.4.15, FortiOS 6.2.0 through 6.2.16, FortiOS 6.0 all versions, FortiPAM 1.2.0, FortiPAM 1.1.0 through 1.1.2, FortiPAM 1.0.0 through 1.0.3, FortiProxy 7.4.0 through 7.4.2, FortiProxy 7.2.0 through 7.2.8, FortiProxy 7.0.0 through 7.0.15, FortiSwitchManager 7.2.0 through 7.2.3, FortiSwitchManager 7.0.0 through 7.0.3 allows an unauthenticated attacker to seize control of a managed device via crafted FGFM requests, if the device is managed by a FortiManager, and if the attacker knows that FortiManager's serial number.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.