CVE-2025-47968
📋 TL;DR
CVE-2025-47968 is a local privilege escalation vulnerability in Microsoft AutoUpdate (MAU) caused by improper input validation. An authenticated attacker could exploit this to gain SYSTEM/administrator privileges on affected systems. This affects Windows and macOS systems running vulnerable versions of Microsoft AutoUpdate.
💻 Affected Systems
- Microsoft AutoUpdate (MAU)
📦 What is this software?
Autoupdate by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining SYSTEM/administrator privileges, enabling persistence, credential theft, lateral movement, and complete control of the affected endpoint.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, access sensitive data, and maintain persistence on compromised systems.
If Mitigated
Limited impact due to proper patch management, endpoint protection, and least privilege principles preventing successful exploitation.
🎯 Exploit Status
Requires local authenticated access. Input validation flaws often have straightforward exploitation paths once discovered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in reference; check Microsoft Security Update Guide for latest patched version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47968
Restart Required: Yes
Instructions:
1. Open Microsoft AutoUpdate application. 2. Check for updates. 3. Install available updates. 4. Restart system if prompted. 5. Verify update completed successfully.
🔧 Temporary Workarounds
Disable Microsoft AutoUpdate Service
windowsTemporarily disable the MAU service to prevent exploitation while awaiting patch
sc stop "Microsoft AutoUpdate"
sc config "Microsoft AutoUpdate" start= disabled
Remove MAU Elevated Privileges
windowsModify MAU service permissions to run with standard user privileges
sc.exe sdset "Microsoft AutoUpdate" D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;IU)(A;;CCLCSWLOCRRC;;;SU)
🧯 If You Can't Patch
- Implement strict least privilege principles - ensure users run with standard user accounts without administrative privileges
- Deploy application control/whitelisting solutions to prevent unauthorized process execution and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Microsoft AutoUpdate version and compare against patched versions in Microsoft Security Update GuideCheck Version:
On Windows: Get-WmiObject Win32_Product | Where-Object {$_.Name -like "*Microsoft AutoUpdate*"} | Select-Object Name, VersionVerify Fix Applied:
Verify MAU has updated to latest version and test privilege escalation attempts fail📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from MAU executable paths
- Failed privilege escalation attempts in security logs
- Suspicious MAU service modifications
Network Indicators:
- Not applicable - local exploitation only
SIEM Query:
EventID=4688 AND (NewProcessName LIKE "%MAU%" OR NewProcessName LIKE "%Microsoft AutoUpdate%") AND SubjectUserName != SYSTEM