CVE-2025-66178: Fortinet FortiWeb

High severity, CVSS 7.2. EPSS: 1.7% chance of exploitation in the next 30 days.

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.1, FortiWeb 7.6.0 through 7.6.5, FortiWeb 7.4.0 through 7.4.11, FortiWeb 7.2.0 through 7.2.12, FortiWeb 7.0.0 through 7.0.12 may allow an authenticated attacked to execute arbitrary commands via a specialy crafted HTTP request.

Affected products

• Fortinet FortiWeb: from 7.0.0, before 7.0.13 (fixed in 7.0.13); from 7.2.0, before 7.2.13 (fixed in 7.2.13); from 7.4.0, before 7.4.12 (fixed in 7.4.12); from 7.6.0, before 7.6.7 (fixed in 7.6.7); from 8.0.0, before 8.0.3 (fixed in 8.0.3)

Published 2026-03-10. Last modified 2026-06-17.