CVE-2021-22127: Fortinet FortiClient

High severity, CVSS 8.0. EPSS: 0.5% chance of exploitation in the next 30 days.

An improper input validation vulnerability in FortiClient for Linux 6.4.x before 6.4.3, FortiClient for Linux 6.2.x before 6.2.9 may allow an unauthenticated attacker to execute arbitrary code on the host operating system as root via tricking the user into connecting to a network with a malicious name.

Affected products

• Fortinet FortiClient: before 6.2.9 (fixed in 6.2.9); from 6.4.0, before 6.4.3 (fixed in 6.4.3)

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