3CX Phone 15 on Windows has insecure permissions on the "%PROGRAMDATA%\3CXPhone for Windows\PhoneApp" installation directory, allowing Full Control access for Everyone, and leading to privilege escalation because of a StartUp link.
- https://www.3cx.com/community/threads/security-issue-with-3cx-windows-client-install.64432/
- https://github.com/Ekitji/siem