An external control of file name or path vulnerability [CWE-73] in FortiClientMac version 7.2.3 and below, version 7.0.10 and below installer may allow a local attacker to execute arbitrary code or commands via writing a malicious configuration file in /tmp before starting the installation process.
https://www.securityweek.com/fortinet-patches-critical-rce-vulnerability-in-forticlientlinux/