CVE-2025-47168
📋 TL;DR
A use-after-free vulnerability in Microsoft Office Word allows attackers to execute arbitrary code on a victim's system by tricking them into opening a malicious document. This affects users running vulnerable versions of Microsoft Word. Successful exploitation requires user interaction.
💻 Affected Systems
- Microsoft Office Word
📦 What is this software?
365 Apps by Microsoft
Office by Microsoft
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Office Long Term Servicing Channel by Microsoft
View all CVEs affecting Office Long Term Servicing Channel →
Word by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local code execution with user privileges, enabling malware installation, credential harvesting, or persistence mechanisms.
If Mitigated
Limited impact due to application sandboxing, restricted user permissions, or macro security settings blocking document execution.
🎯 Exploit Status
Exploitation requires social engineering to deliver malicious document; no public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47168
Restart Required: Yes
Instructions:
1. Open Microsoft Office application
2. Go to File > Account > Update Options
3. Select 'Update Now'
4. Restart computer after update completes
🔧 Temporary Workarounds
Disable Word as email editor
windowsPrevents Word from automatically opening email attachments
Open Outlook > File > Options > Mail > Uncheck 'Use Word as email editor'
Enable Protected View
windowsForces documents from internet to open in read-only mode
File > Options > Trust Center > Trust Center Settings > Protected View > Check all boxes
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized Word documents
- Use email filtering to block .doc/.docx attachments from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Word version against patched versions in Microsoft advisoryCheck Version:
In Word: File > Account > About WordVerify Fix Applied:
Verify Word version matches or exceeds patched version in Microsoft Security Update Guide📡 Detection & Monitoring
Log Indicators:
- Word crash logs with memory access violations
- Unexpected Word process spawning child processes
Network Indicators:
- Unusual outbound connections from Word process
SIEM Query:
Process creation where parent_process contains 'WINWORD.EXE' and command_line contains unusual parameters