FortiOS
CVE-2023-40721: Use of externally-controlled format string in FortiPAM, FortiSwitchManager and others
A use of externally-controlled format string vulnerability [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 3.1 6.3
EPSS0.24%Chance of exploitation in 30 days
Public exploitNot tracked
FixAvailable
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 |
|---|---|
| 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 7.2.2 | 7.2.3 or later |
| FortiSwitchManager 7.0.0 to 7.0.2 | 7.0.3 or later |
| FortiOS 7.4 | 7.4.2 or later |
| FortiOS 7.2.0 to 7.2.5 | 7.2.7 or later |
| FortiOS 7.0.0 to 7.0.13 | 7.0.14 or later |
| FortiOS 6.4.0 to 6.4.16 | Upgrade past 6.4.16; see the advisory |
| FortiOS 6.2.0 to 6.2.17 | Upgrade past 6.2.17; see the advisory |
| FortiProxy 7.4 | 7.4.1 or later |
| FortiProxy 7.2.0 to 7.2.6 | 7.2.8 or later |
| FortiProxy 7.0.0 to 7.0.14 | 7.0.15 or later |
| FortiProxy 2.0.0 to 2.0.14 | Upgrade past 2.0.14; see the advisory |
| FortiProxy 1.2.0 to 1.2.13 | Upgrade past 1.2.13; 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 [CWE-134] vulnerability in Fortinet allows a privileged attacker to execute arbitrary code or commands via specially crafted requests.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.