CVE-2025-49743
📋 TL;DR
A race condition vulnerability in Microsoft Graphics Component allows authenticated attackers to escalate privileges on local systems. This affects users running vulnerable versions of Microsoft Windows with the graphics component enabled. Attackers need existing access to the system to exploit this flaw.
💻 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
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with SYSTEM privileges, enabling complete control over the affected machine, data theft, and lateral movement capabilities.
Likely Case
Local privilege escalation from standard user to administrator/SYSTEM level, allowing installation of malware, persistence mechanisms, and bypassing security controls.
If Mitigated
Limited impact with proper privilege separation and minimal user rights, though some system access may still be gained.
🎯 Exploit Status
Race conditions require precise timing and may be unstable. Requires authenticated access to the target system.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific KB numbers
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49743
Restart Required: No
Instructions:
1. Open Windows Update settings. 2. Check for updates. 3. Install all available security updates. 4. Verify installation via Windows Update history.
🔧 Temporary Workarounds
Restrict local user privileges
allImplement least privilege principle to limit potential damage from successful exploitation
🧯 If You Can't Patch
- Implement application control policies to restrict execution of unauthorized binaries
- Enable Windows Defender Exploit Guard and configure Attack Surface Reduction rules
🔍 How to Verify
Check if Vulnerable:
Check Windows Update history for missing security patches related to CVE-2025-49743Check Version:
wmic qfe list | findstr KBVerify Fix Applied:
Verify the specific KB patch for CVE-2025-49743 is installed via Windows Update history📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events in Windows Security logs (Event ID 4672, 4688)
- Suspicious process creation with elevated privileges
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
EventID=4672 OR EventID=4688 | where ProcessName contains unusual graphics-related processes