CVE-2025-55676
📋 TL;DR
This vulnerability in the Windows USB Video Driver allows an authorized attacker to read sensitive information from error messages. It affects Windows systems with USB video devices. Attackers must have local access to exploit this information disclosure flaw.
💻 Affected Systems
- Windows USB Video Driver
📦 What is this software?
Windows 11 24h2 by Microsoft
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could extract sensitive system information, memory contents, or credentials from error messages, potentially enabling further attacks.
Likely Case
Information disclosure of system details or driver state that could aid in reconnaissance for other attacks.
If Mitigated
Minimal impact with proper access controls and patching, as attackers need local access and the information disclosed is limited.
🎯 Exploit Status
Requires authorized local access and specific conditions to trigger error messages containing sensitive data.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft's monthly security updates for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55676
Restart Required: No
Instructions:
1. Apply latest Windows security updates via Windows Update. 2. For enterprise: Deploy patches through WSUS or Microsoft Endpoint Configuration Manager. 3. Verify update installation in Windows Update history.
🔧 Temporary Workarounds
Restrict USB device usage
allLimit USB video device connections to trusted systems only
Implement least privilege
allEnsure users have minimal necessary permissions to reduce attack surface
🧯 If You Can't Patch
- Implement strict access controls to limit local user privileges
- Monitor for unusual USB device activity or error message generation
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches; review system for USB video devicesCheck Version:
wmic qfe list | findstr KBVerify Fix Applied:
Verify latest Windows security updates are installed; check that KB number from Microsoft advisory is present📡 Detection & Monitoring
Log Indicators:
- Windows Event Log entries related to USB driver errors
- System logs showing unusual USB device activity
Network Indicators:
- Not applicable - local vulnerability only
SIEM Query:
EventID=1 OR EventID=1000 | where ProcessName contains 'usbvideo' | where CommandLine contains error