CVE-2025-58738
📋 TL;DR
CVE-2025-58738 is a use-after-free vulnerability in Inbox COM Objects that allows an unauthorized attacker to execute arbitrary code locally on affected systems. This vulnerability affects Windows systems with specific COM components enabled. Attackers can exploit this to gain local code execution with the privileges of the current user.
💻 Affected Systems
- Microsoft Windows
📦 What is this software?
Windows 10 1507 by Microsoft
Windows 10 1507 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
Full system compromise leading to complete data exfiltration, persistent backdoor installation, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to execute code with higher privileges than their current user context, potentially leading to credential theft and further system access.
If Mitigated
Limited impact with proper application control policies and restricted user privileges, potentially preventing successful exploitation or limiting damage.
🎯 Exploit Status
Requires local access or ability to execute code on target system; exploitation details not publicly available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be determined from Microsoft's monthly security updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58738
Restart Required: Yes
Instructions:
1. Apply the latest Microsoft security updates via Windows Update. 2. For enterprise environments, deploy patches through WSUS or SCCM. 3. Restart affected systems after patch installation.
🔧 Temporary Workarounds
Disable affected COM components
windowsRestrict or disable the specific COM objects involved in the vulnerability
reg add "HKLM\SOFTWARE\Microsoft\Ole" /v "EnableDCOM" /t REG_SZ /d "N" /f
Apply application control policies
windowsUse Windows Defender Application Control or AppLocker to restrict execution of untrusted applications
🧯 If You Can't Patch
- Implement strict least privilege principles for user accounts
- Enable exploit protection mitigations like Control Flow Guard (CFG)
🔍 How to Verify
Check if Vulnerable:
Check system version and installed updates against Microsoft's advisoryCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify the security update is installed via 'wmic qfe list' or 'Get-Hotfix' in PowerShell📡 Detection & Monitoring
Log Indicators:
- Unusual COM object activation events in Windows Event Logs
- Process creation from COM-related executables
Network Indicators:
- Lateral movement attempts following local exploitation
SIEM Query:
EventID=4688 AND (ProcessName="*COM*" OR CommandLine="*CLSID*")