FortiOS fixes three Critical flaws, one allowing unauthenticated super-admin command execution in certain HA setups
Fortinet disclosed FortiOS flaw CVE-2026-126259 on November 10, 2026: on devices using HA FGSP with standalone-config-sync or autoscale, an unauthenticated attacker can send crafted HA packets to run commands as super admin, rated Critical with CVSSv3 9.