CVE-2026-71407

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-12 · updated 2026-10-24
Weakness: CWE-121

Description

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.

Affected products

Fortinet FortiOS (FortiGate): from 7.6.1 before 7.6.7 — fixed in 7.6.7

How to fix

Upgrade to a fixed version: Fortinet FortiOS (FortiGate) 7.6.7. Check the vendor advisory for mitigations.

References

https://fortiguard.fortinet.com/psirt/FG-IR-26-161
https://cert-portal.siemens.com/productcert/html/ssa-127084.html

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