CVE-2026-71407: Fortinet FortiOS

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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: from 7.6.1, before 7.6.7 (fixed in 7.6.7)

Published 2026-08-12. Last modified 2026-09-08.