CVE-2025-24993
📋 TL;DR
A heap-based buffer overflow vulnerability in Windows NTFS allows local attackers to execute arbitrary code with elevated privileges. This affects Windows systems with NTFS file systems. Attackers need local access to exploit this vulnerability.
💻 Affected Systems
- 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 21h2 by Microsoft
Windows 10 21h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 10 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 22h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 23h2 by Microsoft
Windows 11 24h2 by Microsoft
Windows 11 24h2 by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, enabling persistent backdoors, data theft, and lateral movement across the network.
Likely Case
Local privilege escalation allowing attackers to gain administrative control over the compromised system.
If Mitigated
Limited impact due to proper access controls, network segmentation, and endpoint protection blocking exploitation attempts.
🎯 Exploit Status
Requires local access and specific conditions to trigger the buffer overflow. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be determined from Microsoft's security update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24993
Restart Required: No
Instructions:
1. Check Microsoft's security advisory for the specific patch. 2. Apply the latest Windows security updates through Windows Update. 3. For enterprise environments, deploy patches through WSUS or SCCM.
🔧 Temporary Workarounds
Restrict local access
allLimit local user access to systems through proper authentication and authorization controls
Enable exploit protection
WindowsUse Windows Defender Exploit Guard or similar endpoint protection with heap protection features
🧯 If You Can't Patch
- Implement strict access controls and least privilege principles for all user accounts
- Deploy endpoint detection and response (EDR) solutions to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check system against Microsoft's security advisory for affected versionsCheck Version:
wmic os get caption, version, buildnumberVerify Fix Applied:
Verify Windows Update history contains the relevant security patch or check system version against patched versions📡 Detection & Monitoring
Log Indicators:
- Unusual process creation with SYSTEM privileges
- Failed attempts to access NTFS structures
- Security log events showing privilege escalation
Network Indicators:
- Unusual lateral movement from previously low-privilege accounts
SIEM Query:
Process Creation where Parent Process is cmd.exe or powershell.exe and User is SYSTEM