An Insecure Temporary File vulnerability in FortiClient for Windows 6.2.1 and below may allow a local user to gain elevated privileges via exhausting the pool of temporary file names combined with a symbolic link attack.
https://fortiguard.com/psirt/FG-IR-20-040
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-9291