CVE-2021-36187: Fortinet FortiWeb

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

A uncontrolled resource consumption in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below allows attacker to cause a denial of service for webserver daemon via crafted HTTP requests

Affected products

• Fortinet FortiWeb: from 6.2.0, up to and including 6.2.5; from 6.3.0, up to and including 6.3.15; version 6.4.0 only

Published 2021-11-02. Last modified 2026-06-17.