CVE-2025-24035
📋 TL;DR
This vulnerability in Windows Remote Desktop Services allows unauthorized attackers to execute arbitrary code over the network by exploiting improperly locked memory containing sensitive data. It affects systems running vulnerable versions of Windows with RDS enabled. Attackers can potentially gain full control of affected systems.
💻 Affected Systems
- Windows Remote Desktop Services
📦 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 administrative privileges, lateral movement across the network, data exfiltration, and persistent backdoor installation.
Likely Case
Remote code execution leading to malware deployment, credential theft, and system disruption.
If Mitigated
Limited impact due to network segmentation, strong authentication requirements, and proper access controls.
🎯 Exploit Status
Exploitation requires network access to RDS but no authentication. Complexity is medium due to memory manipulation requirements.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be determined from Microsoft's monthly security updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24035
Restart Required: No
Instructions:
1. Check Microsoft's security advisory for affected versions. 2. Apply the latest Windows security updates via Windows Update or WSUS. 3. Verify the patch is installed via system update history.
🔧 Temporary Workarounds
Disable Remote Desktop Services
WindowsTemporarily disable RDS if not required to eliminate the attack surface
sc config TermService start= disabled
net stop TermService /y
Restrict RDS Network Access
WindowsUse firewall rules to limit RDS access to trusted networks only
netsh advfirewall firewall add rule name="Block RDP" dir=in protocol=TCP localport=3389 action=block
🧯 If You Can't Patch
- Implement network segmentation to isolate RDS systems from critical assets
- Enable Network Level Authentication (NLA) for RDS connections
🔍 How to Verify
Check if Vulnerable:
Check Windows version and RDS status via 'systeminfo' and verify against Microsoft's affected versions listCheck Version:
systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Check Windows Update history for the specific security update KB number mentioned in Microsoft's advisory📡 Detection & Monitoring
Log Indicators:
- Unusual RDS connection attempts in Windows Security logs (Event ID 4625)
- Multiple failed authentication attempts followed by successful RDS login
Network Indicators:
- Unusual outbound connections from RDS servers
- Anomalous RDP protocol traffic patterns
SIEM Query:
source="Windows Security" EventCode=4625 OR EventCode=4624 AND LogonType=10 | stats count by src_ip, user