An issue was discovered in Mullvad VPN Windows app before 2023.6-beta1. Insufficient permissions on a directory allow any local unprivileged user to escalate privileges to SYSTEM.
https://github.com/mullvad/mullvadvpn-app/releases/tag/2023.6-beta1
https://github.com/mullvad/mullvadvpn-app/releases/tag/2023.6