CVE-2025-62209
📋 TL;DR
Windows License Manager logs sensitive information to local files, allowing authenticated local users to read this data. This affects Windows systems with the vulnerable License Manager component. Only users with local access to log files can exploit this vulnerability.
💻 Affected Systems
- Windows License Manager
📦 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
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker could extract sensitive system or license information from log files, potentially facilitating further attacks or intellectual property theft.
Likely Case
Local users with read access to log directories could view license keys, system identifiers, or other sensitive data that should not be exposed.
If Mitigated
With proper access controls and log file permissions, only authorized administrators could access these logs, significantly reducing exposure.
🎯 Exploit Status
Exploitation requires local authenticated access and ability to read log files. No privilege escalation is involved.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update for specific KB number
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62209
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates from Microsoft. 2. Install the specific KB patch mentioned in the advisory. 3. Restart the system as required.
🔧 Temporary Workarounds
Restrict log file permissions
windowsSet strict ACLs on Windows License Manager log directories to prevent unauthorized read access
icacls "C:\Windows\Logs\LicenseManager" /inheritance:r /grant "Administrators:(OI)(CI)F" /grant "SYSTEM:(OI)(CI)F"
Disable debug logging
windowsConfigure License Manager to not log sensitive information
Check registry settings for License Manager logging configuration
🧯 If You Can't Patch
- Implement strict access controls on log directories to limit read access to administrators only
- Monitor access to License Manager log files and alert on unauthorized read attempts
🔍 How to Verify
Check if Vulnerable:
Check if sensitive data appears in License Manager log files at C:\Windows\Logs\LicenseManager\Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify Windows Update history contains the relevant KB patch and check that sensitive data no longer appears in logs📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to License Manager log files
- Sensitive data patterns in log files
Network Indicators:
- N/A - local vulnerability only
SIEM Query:
EventID=4663 AND ObjectName="*LicenseManager*" AND AccessMask=0x1