An Insecure Temporary File (CWE-377) vulnerability in FortiClient for Windows may allow a local user to gain elevated privileges via exhausting the pool of temporary file names combined with a symbolic link attack.

An unsafe search path vulnerability in FortiClientWindows 7.0.0, 6.4.6 and below, 6.2.x, 6.0.x and FortiClientEMS 7.0.0, 6.4.6 and below, 6.2.x, 6.0.x may allow an attacker to perform a DLL Hijack attack on affected devices via a malicious OpenSSL engine library in the search path.

A combination of a use of hard-coded cryptographic key vulnerability [CWE-321] in FortiClientEMS 7.0.1 and below, 6.4.6 and below and an improper certificate validation vulnerability [CWE-297] in FortiClientWindows, FortiClientLinux and FortiClientMac 7.0.1 and below, 6.4.6 and below may allow an unauthenticated and network adjacent attacker to perform a man-in-the-middle attack between the EMS and the FCT via the telemetry protocol.