FortiClient (Windows) - privilege escalation in online installer due to incorrect working directory


An improper initialization [CWE-665] vulnerability in FortiClient (Windows) may allow a local attacker to gain administrative privileges via placing a malicious executable inside the FortiClient installer's directory.

Affected Products

FortiClient (Windows) version 6.4.7 and below
FortiClient (Windows) version 7.0.2 and below
FortiClient (Windows) 6.0 all versions
FortiClient (Windows) 6.2 all versions


Upgrade to FortiClient (Windows) 7.0.3 or above

Upgrade to FortiClient (Windows) 6.4.8 or above


Fortinet is pleased to thank JaeHeng Yoon of JENBlack Soft for reporting this vulnerability under responsible disclosure.