CVE-2025-24074
📋 TL;DR
This vulnerability allows an authorized attacker with local access to a Windows system to elevate privileges through improper input validation in the Desktop Window Manager (DWM) Core Library. Attackers could gain SYSTEM-level privileges from a lower-privileged account. This affects Windows systems with the vulnerable DWM component.
💻 Affected Systems
- Windows Desktop Window Manager (DWM) Core Library
📦 What is this software?
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 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where an attacker gains 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, or access sensitive data normally restricted to higher-privileged accounts.
If Mitigated
Limited impact if proper privilege separation and least-privilege principles are enforced, though successful exploitation still provides elevated access.
🎯 Exploit Status
Exploitation requires local authenticated access and knowledge of the vulnerability. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's monthly security updates for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24074
Restart Required: Yes
Instructions:
1. Apply the latest Windows security updates from Microsoft. 2. Restart the system to complete the installation. 3. Verify the update was successfully applied.
🔧 Temporary Workarounds
Restrict Local Access
windowsLimit local access to systems to only authorized users and implement strict access controls.
Implement Least Privilege
windowsEnsure users operate with minimal necessary privileges to reduce impact if exploitation occurs.
🧯 If You Can't Patch
- Implement strict access controls and monitor for unusual privilege escalation attempts
- Segment networks to limit lateral movement potential from compromised systems
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security updates or use Microsoft's Security Update Guide with the CVE IDCheck Version:
wmic os get caption, version, buildnumber, osarchitectureVerify Fix Applied:
Verify the latest Windows security updates are installed and check that the system is no longer listed as vulnerable in security scans📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in Windows Security logs
- Process creation with SYSTEM privileges from non-administrative accounts
Network Indicators:
- Unusual outbound connections from systems after local exploitation
SIEM Query:
EventID=4688 AND NewProcessName CONTAINS 'cmd.exe' OR 'powershell.exe' AND SubjectUserName NOT IN (admin_users) AND TokenElevationType='%%1938'