FortiOS
CVE-2026-71407: Stack-based Buffer Overflow in FortiOS, FortiPAM and others
A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.
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 7.6.1 to 7.6.6 | 7.6.7 or later |
| FortiPAM 1.8.0 to 1.8.4 | Upgrade past 1.8.4; see the advisory |
| FortiPAM 1.7.0 to 1.7.2 | Upgrade past 1.7.2; see the advisory |
| FortiPAM 1.6.0 to 1.6.2 | Upgrade past 1.6.2; see the advisory |
| FortiPAM 1.5.0 to 1.5.1 | Upgrade past 1.5.1; see the advisory |
| FortiPAM 1.4.0 to 1.4.3 | Upgrade past 1.4.3; see the advisory |
| FortiPAM 1.3.0 to 1.3.1 | Upgrade past 1.3.1; 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 |
| FortiProxy 7.6.0 to 7.6.4 | Upgrade past 7.6.4; see the advisory |
| FortiProxy 7.4.0 to 7.4.11 | Upgrade past 7.4.11; see the advisory |
| FortiProxy 7.2.0 to 7.2.16 | Upgrade past 7.2.16; see the advisory |
| FortiProxy 7.0.0 to 7.0.23 | Upgrade past 7.0.23; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
A Stack-based Buffer Overflow vulnerability [CWE-121] vulnerability in Fortinet FortiOS 7.6.1 through 7.6.6 may allow an unauthenticated attacker who can bypass stack protection and ASLR to execute arbitrary code or commands in the context of the WAD daemon via crafted sockets, only if the explicit proxy is configured with Kerberos authentication and SOCKS enabled.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.