CVE-2021-41018: Fortinet FortiWeb

High severity, CVSS 8.8. EPSS: 3.3% chance of exploitation in the next 30 days.

A improper neutralization of special elements used in an os command ('os command injection') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to execute unauthorized code or commands via crafted HTTP requests.

Affected products

• Fortinet FortiWeb: from 6.2.0, before 6.2.7 (fixed in 6.2.7); from 6.3.0, before 6.3.16 (fixed in 6.3.16); from 6.4.0, before 6.4.2 (fixed in 6.4.2)

Published 2022-02-02. Last modified 2026-06-17.