CVE-2019-5589: Fortinet FortiClient

High severity, CVSS 7.8. EPSS: 2.6% chance of exploitation in the next 30 days.

An Unsafe Search Path vulnerability in FortiClient Online Installer (Windows version before 6.0.6) may allow an unauthenticated, remote attacker with control over the directory in which FortiClientOnlineInstaller.exe resides to execute arbitrary code on the system via uploading malicious .dll files in that directory.

Affected products

• Fortinet FortiClient: before 6.0.6 (fixed in 6.0.6)

Published 2019-05-28. Last modified 2026-06-17.