CVE-2021-42753: Fortinet FortiWeb

High severity, CVSS 8.1. EPSS: 1.1% chance of exploitation in the next 30 days.

An improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability [CWE-22] in FortiWeb management interface 6.4.1 and below, 6.3.15 and below, 6.2.x, 6.1.x, 6.0.x, 5.9.x and 5.8.x may allow an authenticated attacker to perform an arbitrary file and directory deletion in the device filesystem.

Affected products

• Fortinet FortiWeb: from 5.8.0, 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.