CVE-2025-27743
📋 TL;DR
CVE-2025-27743 is an untrusted search path vulnerability in Microsoft System Center that allows an authorized attacker to execute arbitrary code with elevated privileges by placing a malicious DLL in a location searched by the application. This affects administrators and users with legitimate access to System Center installations. The vulnerability requires local access to the system.
💻 Affected Systems
- Microsoft System Center
📦 What is this software?
System Center Data Protection Manager by Microsoft
View all CVEs affecting System Center Data Protection Manager →
System Center Data Protection Manager by Microsoft
View all CVEs affecting System Center Data Protection Manager →
System Center Data Protection Manager by Microsoft
View all CVEs affecting System Center Data Protection Manager →
System Center Operations Manager by Microsoft
System Center Operations Manager by Microsoft
System Center Operations Manager by Microsoft
System Center Virtual Machine Manager by Microsoft
View all CVEs affecting System Center Virtual Machine Manager →
⚠️ Risk & Real-World Impact
Worst Case
An attacker with valid credentials could achieve full system compromise, install persistent backdoors, steal sensitive data, and move laterally across the network.
Likely Case
An authorized user or compromised account could elevate privileges to gain administrative control over the System Center server and potentially the domain.
If Mitigated
With proper access controls and monitoring, exploitation would be detected and contained before significant damage occurs.
🎯 Exploit Status
Exploitation requires local access and valid credentials. DLL hijacking attacks are well-understood and relatively simple to execute once the vulnerable search path is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Update Catalog for latest System Center updates
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-27743
Restart Required: Yes
Instructions:
1. Review Microsoft Security Advisory for CVE-2025-27743. 2. Apply the latest System Center updates via Windows Update or Microsoft Update Catalog. 3. Restart affected systems as required. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict DLL Search Path
windowsConfigure System Center to use absolute paths or restrict DLL loading from untrusted directories
Use Group Policy or application control policies to restrict DLL loading from user-writable directories
Implement Least Privilege
windowsRestrict user permissions to prevent unauthorized DLL placement in search paths
Configure NTFS permissions to deny write access to System Center directories for standard users
🧯 If You Can't Patch
- Implement strict access controls to limit who can place files in System Center directories
- Monitor for suspicious DLL loading events and file creation in System Center paths
🔍 How to Verify
Check if Vulnerable:
Check System Center version against patched versions in Microsoft advisory. Review if DLL search path includes user-writable directories.Check Version:
Check System Center version through Control Panel > Programs and Features or using PowerShell: Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like '*System Center*'}Verify Fix Applied:
Verify System Center has been updated to patched version. Test that DLL hijacking attempts fail in previously vulnerable paths.📡 Detection & Monitoring
Log Indicators:
- Event ID 4688 (process creation) showing System Center loading DLLs from unusual paths
- Security logs showing unauthorized file creation in System Center directories
- Sysmon Event ID 7 (image loaded) for suspicious DLL loads
Network Indicators:
- Unusual outbound connections from System Center servers post-exploitation
SIEM Query:
source="windows" (EventID=4688 OR EventID=7) Image="*SystemCenter*" (NewProcessName="*.dll" OR ImageLoaded="*.dll") | where file_path contains "Users" or file_path contains "Temp"