CVE-2025-47996
📋 TL;DR
An integer underflow vulnerability in the Windows MBT Transport driver allows authenticated attackers to execute arbitrary code with elevated SYSTEM privileges. This affects Windows systems where an attacker has initial user-level access. The vulnerability enables local privilege escalation from a standard user account to full system control.
💻 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, lateral movement, and data exfiltration.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install additional malware, and maintain persistence on compromised systems.
If Mitigated
Limited impact if proper access controls, least privilege principles, and endpoint protection are implemented, though the vulnerability still provides a foothold for escalation.
🎯 Exploit Status
Requires local access and user privileges; integer underflow exploitation typically requires specific conditions to trigger reliably.
🛠️ 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-2025-47996
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates via Windows Update. 2. For enterprise: Deploy through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify installation via 'winver' command showing updated build number.
🔧 Temporary Workarounds
Restrict local user privileges
windowsImplement least privilege access controls to limit initial attack surface
Enable exploit protection
windowsConfigure Windows Defender Exploit Guard to mitigate memory corruption attacks
🧯 If You Can't Patch
- Implement strict access controls and monitor for privilege escalation attempts
- Deploy endpoint detection and response (EDR) solutions to detect exploitation behavior
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-47996Check Version:
winver or systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB patch is installed via 'Get-Hotfix -Id KBxxxxxxx' in PowerShell📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- MBT Transport driver crash logs
- Suspicious process creation with SYSTEM privileges
Network Indicators:
- None - local exploitation only
SIEM Query:
EventID=4688 AND NewProcessName contains 'cmd.exe' OR 'powershell.exe' AND SubjectUserName != SYSTEM AND TokenElevationType=2