CVE-2021-41019: Fortinet FortiOS

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An improper validation of certificate with host mismatch [CWE-297] vulnerability in FortiOS versions 6.4.6 and below may allow the connection to a malicious LDAP server via options in GUI, leading to disclosure of sensitive information, such as AD credentials.

Affected products

• Fortinet FortiOS: from 6.4.0, up to and including 6.4.6

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