CVE-2022-26913
📋 TL;DR
CVE-2022-26913 is a Windows authentication information disclosure vulnerability that allows an attacker to obtain sensitive authentication information from a targeted system. This affects Windows systems with specific authentication configurations. Attackers could potentially use this information to further compromise systems.
💻 Affected Systems
- Windows Server
- Windows Client
📦 What is this software?
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 10 by Microsoft
Windows 11 by Microsoft
Windows 11 by Microsoft
Windows Server by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker obtains authentication credentials or tokens that could lead to lateral movement, privilege escalation, or complete system compromise.
Likely Case
Information disclosure of authentication-related data that could aid in reconnaissance or facilitate other attacks.
If Mitigated
Limited information disclosure with minimal impact if proper network segmentation and authentication controls are in place.
🎯 Exploit Status
Exploitation requires local access or ability to interact with authentication services.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: May 2022 security updates
Vendor Advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-26913
Restart Required: Yes
Instructions:
1. Apply May 2022 Windows security updates via Windows Update. 2. For enterprise environments, deploy updates through WSUS or SCCM. 3. Restart affected systems after patch installation.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to authentication services and vulnerable systems
Authentication Monitoring
windowsEnable detailed authentication logging and monitoring
auditpol /set /subcategory:"Logon" /success:enable /failure:enable
🧯 If You Can't Patch
- Implement strict network segmentation to isolate authentication services
- Enable enhanced authentication logging and monitor for suspicious authentication events
🔍 How to Verify
Check if Vulnerable:
Check if system is running affected Windows versions without May 2022 security updatesCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify May 2022 security updates are installed via Windows Update history or systeminfo command📡 Detection & Monitoring
Log Indicators:
- Unusual authentication events
- Multiple failed authentication attempts
- Authentication service anomalies
Network Indicators:
- Unusual traffic to authentication ports
- Authentication protocol anomalies
SIEM Query:
EventID=4625 OR EventID=4648 | where AuthenticationPackage contains vulnerable components