CVE-2025-50174
📋 TL;DR
CVE-2025-50174 is a use-after-free vulnerability in the Windows Device Association Broker service that allows an authenticated attacker to execute arbitrary code with elevated privileges. This affects Windows systems where an attacker already has local access. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Windows Device Association Broker service
📦 What is this software?
Windows 11 24h2 by Microsoft
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with SYSTEM privileges, enabling installation of malware, data theft, and persistence mechanisms.
Likely Case
Privilege escalation from a standard user account to SYSTEM or administrator level, allowing lateral movement and further compromise.
If Mitigated
Limited impact if proper access controls, least privilege principles, and endpoint protection are in place.
🎯 Exploit Status
Requires local authenticated access and specific conditions to trigger the use-after-free condition.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-50174
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates from Microsoft Update. 2. Restart system if required. 3. Verify patch installation via Windows Update history.
🔧 Temporary Workarounds
Disable Device Association Broker service
windowsDisables the vulnerable service to prevent exploitation
sc config DeviceAssociationBrokerSvc start= disabled
sc stop DeviceAssociationBrokerSvc
Restrict service permissions
windowsLimit who can interact with the service
sc sdset DeviceAssociationBrokerSvc D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)S:(AU;FA;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;WD)
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles
- Deploy endpoint detection and response (EDR) solutions to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-50174Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB patch is installed via 'wmic qfe list' or PowerShell 'Get-HotFix'📡 Detection & Monitoring
Log Indicators:
- Unusual service crashes in Event Viewer (Event ID 1000, 1001)
- Suspicious process creation from DeviceAssociationBrokerSvc
Network Indicators:
- Local privilege escalation attempts
SIEM Query:
EventID=4688 AND NewProcessName="*" AND ParentProcessName="*DeviceAssociationBroker*"