CVE-2025-24994
📋 TL;DR
This vulnerability allows an authenticated attacker on a Windows system to exploit improper access control in the Cross Device Service to gain elevated local privileges. It affects Windows systems with the vulnerable service enabled. Attackers could potentially execute code with higher privileges than originally granted.
💻 Affected Systems
- Windows Cross Device Service
📦 What is this software?
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
An authenticated attacker gains SYSTEM-level privileges, enabling complete compromise of the local system, installation of persistent malware, credential theft, and lateral movement within the network.
Likely Case
An authenticated user with standard privileges escalates to administrator or SYSTEM privileges, allowing them to bypass security controls, install unauthorized software, or access protected resources.
If Mitigated
With proper access controls and least privilege principles, the impact is limited to the specific user account, preventing lateral movement and system-wide compromise.
🎯 Exploit Status
Requires authenticated access and knowledge of the specific service manipulation technique. No public exploit code is currently available.
🛠️ 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-2025-24994
Restart Required: No
Instructions:
1. Apply the latest Windows security updates from Microsoft. 2. Use Windows Update or WSUS to deploy patches. 3. Verify the patch is applied using Windows Update history.
🔧 Temporary Workarounds
Disable Windows Cross Device Service
WindowsDisables the vulnerable service to prevent exploitation
sc config cbdhsvc_* start= disabled
sc stop cbdhsvc_*
🧯 If You Can't Patch
- Implement strict least privilege access controls to limit user permissions
- Monitor for unusual service manipulation or privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check if Windows Cross Device Service is running: sc query cbdhsvc_*Check Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify Windows Update history for the specific security update KB number📡 Detection & Monitoring
Log Indicators:
- Event ID 4688 with Cross Device Service process creation
- Unexpected privilege escalation events in Security logs
- Service manipulation attempts in System logs
Network Indicators:
- No specific network indicators as this is local exploitation
SIEM Query:
EventID=4688 AND (NewProcessName="*cbdhsvc*" OR ParentProcessName="*cbdhsvc*")