CVE-2025-55230
📋 TL;DR
This vulnerability allows an authenticated attacker to exploit an untrusted pointer dereference in the Windows MBT Transport driver to gain elevated local privileges. It affects Windows systems with the vulnerable driver component. Attackers could escalate from a standard user account to SYSTEM-level access.
💻 Affected Systems
- Windows MBT Transport Driver
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1607 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 1809 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling installation of persistent malware, credential theft, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install additional malware, and access sensitive data on the compromised system.
If Mitigated
Limited impact if proper endpoint protection, least privilege principles, and network segmentation are implemented, though the vulnerability still provides a foothold for attackers.
🎯 Exploit Status
Requires authenticated local access; exploitation involves manipulating driver pointers to achieve privilege escalation.
🛠️ 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-2025-55230
Restart Required: Yes
Instructions:
1. Open Windows Update Settings
2. Click 'Check for updates'
3. Install all available security updates
4. Restart system when prompted
🔧 Temporary Workarounds
Disable MBT Transport Driver
windowsTemporarily disable the vulnerable driver component if patching is not immediately possible
sc stop mbt
sc config mbt start= disabled
🧯 If You Can't Patch
- Implement strict least privilege policies to limit standard user capabilities
- Deploy endpoint detection and response (EDR) solutions to monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-55230Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the security update is installed via Windows Update history or systeminfo command📡 Detection & Monitoring
Log Indicators:
- Unexpected driver loading events
- Process creation with SYSTEM privileges from non-privileged accounts
- Security log Event ID 4688 with elevated token
Network Indicators:
- Unusual outbound connections following local privilege escalation
SIEM Query:
EventID=4688 AND NewProcessName="*" AND TokenElevationType="%%1938"