CVE-2024-49033
📋 TL;DR
This vulnerability allows attackers to bypass security features in Microsoft Word, potentially enabling them to execute malicious code or access restricted content. It affects users running vulnerable versions of Microsoft Word on Windows systems. The vulnerability requires user interaction, such as opening a specially crafted document.
💻 Affected Systems
- Microsoft 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
Complete system compromise through arbitrary code execution with user privileges, leading to data theft, ransomware deployment, or lateral movement within networks.
Likely Case
Limited document manipulation or data extraction from Word files, potentially leading to information disclosure or limited system access.
If Mitigated
Minimal impact with proper security controls; malicious documents blocked by email filters or security software before reaching users.
🎯 Exploit Status
Exploitation requires social engineering to deliver malicious document. No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest security updates from Microsoft
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-49033
Restart Required: Yes
Instructions:
1. Open Microsoft Word. 2. Go to File > Account > Update Options > Update Now. 3. Restart Word after update completes. 4. Alternatively, use Windows Update for system-wide Office updates.
🔧 Temporary Workarounds
Block Office macros from internet
windowsPrevents execution of macros from internet sources
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Office\16.0\Word\Security" -Name "BlockInternetMacros" -Value 1 -Type DWord
Enable Protected View
windowsForces documents from internet to open in restricted mode
Set-ItemProperty -Path "HKCU:\Software\Microsoft\Office\16.0\Word\Security\ProtectedView" -Name "DisableInternetFilesInPV" -Value 0 -Type DWord
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized Word documents
- Deploy email filtering to block suspicious Office attachments
🔍 How to Verify
Check if Vulnerable:
Check Word version against patched versions in Microsoft Security Update GuideCheck Version:
Open Word > File > Account > About WordVerify Fix Applied:
Verify Word version matches or exceeds patched version listed in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Unusual Word process behavior
- Multiple document opens from untrusted sources
- Security feature bypass attempts in Office logs
Network Indicators:
- Downloads of suspicious Office documents from external sources
- Unusual outbound connections after document opens
SIEM Query:
EventID=1 AND ProcessName="WINWORD.EXE" AND CommandLine CONTAINS "-Embedding" AND ParentProcess NOT IN ("explorer.exe","outlook.exe")