CVE-2021-26116: Fortinet Fortiauthenticator

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

An improper neutralization of special elements used in an OS command vulnerability in the command line interpreter of FortiAuthenticator before 6.3.1 may allow an authenticated attacker to execute unauthorized commands via specifically crafted arguments to existing commands.

Affected products

• Fortinet Fortiauthenticator: from 5.0.0, before 6.3.1 (fixed in 6.3.1)

Published 2022-04-06. Last modified 2026-06-17.