CVE-2025-58736
📋 TL;DR
This vulnerability involves a use-after-free flaw in Inbox COM Objects that allows an unauthorized attacker to execute arbitrary code locally on affected systems. It affects Windows systems with vulnerable COM components, potentially enabling local privilege escalation or system compromise.
💻 Affected Systems
- Microsoft Windows
📦 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
Complete system compromise with administrative privileges, data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation allowing attackers to gain higher privileges on already compromised systems or execute malicious payloads.
If Mitigated
Limited impact with proper patch management, endpoint protection, and least privilege principles in place.
🎯 Exploit Status
Requires local execution capability. Exploitation involves manipulating COM object memory after free.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be specified in Microsoft Security Update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58736
Restart Required: Yes
Instructions:
1. Apply latest Windows security updates via Windows Update. 2. For enterprise: Deploy through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify update installation and restart systems as required.
🔧 Temporary Workarounds
Restrict COM Object Access
windowsLimit access to vulnerable COM objects using Component Services administrative tool
Component Services > Computers > My Computer > COM+ Applications
Enable Exploit Protection
windowsUse Windows Defender Exploit Guard to apply memory protection controls
Windows Security > App & browser control > Exploit protection settings
🧯 If You Can't Patch
- Implement strict application whitelisting to prevent unauthorized code execution
- Apply principle of least privilege to limit potential damage from local exploits
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-58736Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify KB article installation via 'wmic qfe list' or 'Get-Hotfix' in PowerShell📡 Detection & Monitoring
Log Indicators:
- Unusual COM object access patterns
- Process creation from unexpected COM hosts
- Memory access violations in application logs
Network Indicators:
- Not network exploitable - local vulnerability only
SIEM Query:
Process Creation where (ParentImage contains 'dllhost.exe' OR ParentImage contains 'rundll32.exe') AND CommandLine contains unusual COM references