CVE-2025-49738
📋 TL;DR
This vulnerability allows an authorized attacker with local access to exploit improper link resolution in Microsoft PC Manager, enabling privilege escalation. Attackers can manipulate symbolic links or junctions to access files with higher privileges than intended. This affects users running vulnerable versions of Microsoft PC Manager on Windows systems.
💻 Affected Systems
- Microsoft PC Manager
📦 What is this software?
Pc Manager by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise where an attacker gains SYSTEM/administrator privileges, installs persistent malware, accesses sensitive data, and disables security controls.
Likely Case
Local privilege escalation allowing attackers to bypass security restrictions, install unauthorized software, or modify system configurations.
If Mitigated
Limited impact if proper access controls, least privilege principles, and endpoint protection are in place, though local privilege escalation remains possible.
🎯 Exploit Status
Requires local access and some technical knowledge to create malicious symbolic links/junctions. The attacker must be able to execute code on the target system with user-level privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version from Microsoft Update (specific version not specified in reference)
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49738
Restart Required: Yes
Instructions:
1. Open Windows Settings. 2. Navigate to Windows Update. 3. Click 'Check for updates'. 4. Install all available updates. 5. Restart the system if prompted. Alternatively, update Microsoft PC Manager through the Microsoft Store.
🔧 Temporary Workarounds
Uninstall Microsoft PC Manager
windowsRemove the vulnerable application entirely to eliminate the attack surface
Control Panel > Programs > Uninstall a program > Select Microsoft PC Manager > Uninstall
Restrict Symbolic Link Creation
windowsConfigure Windows to restrict who can create symbolic links (requires administrative privileges)
gpedit.msc > Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment > Create symbolic links
🧯 If You Can't Patch
- Implement strict least privilege principles - ensure users operate with minimal necessary permissions
- Deploy endpoint detection and response (EDR) solutions to monitor for suspicious file access patterns and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Microsoft PC Manager version in Settings > Apps > Installed apps. If version is older than the patched release, the system is vulnerable.Check Version:
Get-AppxPackage -Name *Microsoft.PCManager* | Select-Object VersionVerify Fix Applied:
Verify Windows Update history shows the latest security updates installed and Microsoft PC Manager has been updated to the latest version.📡 Detection & Monitoring
Log Indicators:
- Windows Security Event ID 4688 (process creation) showing PC Manager processes accessing unexpected file paths
- Event ID 4656 (handle to object) showing unusual file access patterns
Network Indicators:
- Minimal network indicators as this is a local attack
SIEM Query:
EventID=4688 AND ProcessName="*PCManager*" AND CommandLine="*" | stats count by CommandLine