CVE-2017-7344: Fortinet FortiClient

High severity, CVSS 8.1. EPSS: 1.9% chance of exploitation in the next 30 days.

A privilege escalation in Fortinet FortiClient Windows 5.4.3 and earlier as well as 5.6.0 allows attacker to gain privilege via exploiting the Windows "security alert" dialog thereby popping up when the "VPN before logon" feature is enabled and an untrusted certificate chain.

Affected products

• Fortinet FortiClient: up to and including 5.4.3; version 5.6.0 only

Published 2017-12-14. Last modified 2026-06-17.