WiX toolset lets developers create installers for Windows Installer, the Windows installation engine. The .be TEMP folder is vulnerable to DLL redirection attacks that allow the attacker to escalate privileges. This impacts any installer built with the WiX installer framework. This issue has been patched in version 4.0.4.
https://github.com/wixtoolset/issues/security/advisories/GHSA-7wh2-wxc7-9ph5