CVE-2025-47159
📋 TL;DR
A protection mechanism failure in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally. This vulnerability enables attackers with initial access to gain higher privileges on the system. It affects Windows systems with VBS enabled.
💻 Affected Systems
- Windows 10
- Windows 11
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
📦 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
An attacker with initial access could achieve SYSTEM-level privileges, potentially compromising the entire Windows host and accessing sensitive data or deploying persistent malware.
Likely Case
An authenticated attacker could elevate from standard user to administrator privileges, enabling lateral movement, credential theft, and installation of additional malicious tools.
If Mitigated
With proper access controls and monitoring, the impact is limited to the compromised user account, though privilege escalation still poses significant risk.
🎯 Exploit Status
Requires local access and authorization on the target system. The attacker needs to be able to execute code on the system before exploiting this vulnerability.
🛠️ 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-2025-47159
Restart Required: Yes
Instructions:
1. Open Windows Update Settings
2. Click 'Check for updates'
3. Install all available security updates
4. Restart the system when prompted
🔧 Temporary Workarounds
Disable VBS (Not Recommended)
windowsDisabling Virtualization-Based Security removes the vulnerable component but also disables important security features like Credential Guard and Hypervisor-protected Code Integrity
bcdedit /set hypervisorlaunchtype off
Restart required
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles to limit initial access
- Enable enhanced monitoring for privilege escalation attempts and unusual process behavior
🔍 How to Verify
Check if Vulnerable:
Check if VBS is enabled via System Information (msinfo32.exe) or PowerShell: Get-ComputerInfo -Property "DeviceGuard*"Check Version:
winver or systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify Windows Update history shows the relevant security update installed and system has been restarted📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4688 (Process Creation) showing unusual parent-child process relationships
- Event ID 4672 (Special privileges assigned to new logon) for unexpected privilege assignments
Network Indicators:
- Unusual outbound connections following local privilege escalation
SIEM Query:
EventID=4688 AND (ParentImage LIKE '%cmd.exe%' OR ParentImage LIKE '%powershell.exe%') AND NewProcessName LIKE '%system32%' AND IntegrityLevel="System"