CVE-2026-20824
📋 TL;DR
This vulnerability allows an unauthorized attacker to bypass a local security feature in Windows Remote Assistance. Attackers could potentially gain unauthorized access to remote assistance sessions. This affects Windows systems with Remote Assistance enabled.
💻 Affected Systems
- Windows Remote Assistance
📦 What is this software?
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 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 25h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could intercept or manipulate remote assistance sessions, potentially gaining unauthorized access to sensitive information or system control.
Likely Case
Local attackers bypass security controls to view or interfere with legitimate remote assistance sessions.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized session viewing without system compromise.
🎯 Exploit Status
Requires local access to the system. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20824
Restart Required: Yes
Instructions:
1. Open Windows Update settings
2. Check for updates
3. Install all available security updates
4. Restart system when prompted
🔧 Temporary Workarounds
Disable Remote Assistance
windowsTemporarily disable Windows Remote Assistance feature
Control Panel > System > Remote settings > Uncheck 'Allow Remote Assistance connections to this computer'
🧯 If You Can't Patch
- Restrict local access to systems using Remote Assistance
- Monitor Remote Assistance session logs for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check if Remote Assistance is enabled in System Properties > Remote settingsCheck Version:
winverVerify Fix Applied:
Verify Windows Update history shows the latest security patches installed📡 Detection & Monitoring
Log Indicators:
- Unexpected Remote Assistance session initiation
- Multiple failed authentication attempts for Remote Assistance
Network Indicators:
- Unusual Remote Assistance traffic patterns
- Remote Assistance connections from unexpected IP addresses
SIEM Query:
EventID=1149 OR EventID=1150 (Remote Assistance events) with suspicious patterns