EIP-2026-117961

PRE-CVE

Steam Windows Client - Local Privilege Escalation

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-117961. PoCs published by AbsoZed.

AI-analyzed exploit summary This PowerShell script exploits a local privilege escalation vulnerability by manipulating the Steam registry key and the Windows Installer service (msiserver) to execute a malicious payload with elevated privileges. It downloads and executes a reverse shell payload from a GitHub repository.

Description

Steam Windows Client - Local Privilege Escalation

Exploits (1)

exploitdb WORKING POC
by AbsoZed · powershelllocalwindows
https://www.exploit-db.com/exploits/47238

This PowerShell script exploits a local privilege escalation vulnerability by manipulating the Steam registry key and the Windows Installer service (msiserver) to execute a malicious payload with elevated privileges. It downloads and executes a reverse shell payload from a GitHub repository.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Steam Client Service and Windows Installer Service (msiserver)
Auth required
Prerequisites: Local access to the system · Steam Client Service installed · Administrative privileges to modify registry keys
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026