CVE-2022-45856: Fortinet FortiClient

Medium severity, CVSS 5.9. EPSS: 0.2% chance of exploitation in the next 30 days.

An improper certificate validation vulnerability [CWE-295] in FortiClientWindows 6.4 all versions, 7.0.0 through 7.0.7, FortiClientMac 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientLinux 6.4 all versions, 7.0 all versions, 7.2.0 through 7.2.4, FortiClientAndroid 6.4 all versions, 7.0 all versions, 7.2.0 and FortiClientiOS 5.6 all versions, 6.0.0 through 6.0.1, 7.0.0 through 7.0.6 SAML SSO feature may allow an unauthenticated attacker to man-in-the-middle the communication between the FortiClient and  both the service provider and the identity provider.

Affected products

• Fortinet FortiClient: from 5.0, before 7.2.1 (fixed in 7.2.1); from 6.4, before 7.2.5 (fixed in 7.2.5); from 6.4, before 7.0.8 (fixed in 7.0.8); from 2.0, before 7.0.7 (fixed in 7.0.7)

Published 2024-09-10. Last modified 2026-06-17.