CVE-2025-62215
📋 TL;DR
This Windows Kernel race condition vulnerability allows authenticated local attackers to escalate privileges by exploiting improper synchronization of shared resources. It affects Windows systems where an attacker already has some level of access. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Microsoft Windows
📦 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 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with SYSTEM/administrator privileges, enabling installation of persistent malware, credential theft, and lateral movement across the network.
Likely Case
Local privilege escalation from standard user to administrator/SYSTEM level, allowing attackers to bypass security controls and install malicious software.
If Mitigated
Limited impact with proper privilege separation, application control policies, and endpoint protection that detects privilege escalation attempts.
🎯 Exploit Status
Exploitation requires local authenticated access and knowledge of Windows kernel internals. Race conditions can be challenging to reliably exploit.
🛠️ 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-2025-62215
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
Restrict Local Access
windowsLimit local interactive logon rights to essential users only
gpedit.msc -> Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> User Rights Assignment -> 'Allow log on locally'
Enable Attack Surface Reduction
windowsConfigure Windows Defender Exploit Guard to block privilege escalation attempts
Set-MpPreference -AttackSurfaceReductionRules_Ids D4F940AB-401B-4EFC-AADC-AD5F3C50688A -AttackSurfaceReductionRules_Actions Enabled
🧯 If You Can't Patch
- Implement strict principle of least privilege - ensure users operate with minimal necessary permissions
- Deploy endpoint detection and response (EDR) solutions configured to alert on privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Windows version and installed updates against Microsoft Security Update Guide for CVE-2025-62215Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the specific KB update mentioned in Microsoft advisory is installed via 'winver' or 'systeminfo' command📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4688 (Process Creation) showing unexpected privilege escalation
- Event ID 4672 (Special privileges assigned to new logon)
- Sysmon Event ID 10 (Process Access) targeting high-privilege processes
Network Indicators:
- Lateral movement attempts following local privilege escalation
- Unexpected outbound connections from previously low-privilege accounts
SIEM Query:
source="windows_security" event_id=4688 AND (process_name="cmd.exe" OR process_name="powershell.exe") AND integrity_level_change="High"