CVE-2025-62216
📋 TL;DR
This vulnerability is a use-after-free memory corruption flaw in Microsoft Office that allows an attacker to execute arbitrary code on a victim's system. Attackers can exploit this by tricking users into opening a malicious Office document. All users running vulnerable versions of Microsoft Office are affected.
💻 Affected Systems
- Microsoft Office
📦 What is this software?
365 Apps by Microsoft
365 Apps 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 →
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer, enabling data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive files, credential theft, and lateral movement within the network.
If Mitigated
Limited impact with proper application sandboxing and memory protection mechanisms preventing successful exploitation.
🎯 Exploit Status
Exploitation requires user interaction and knowledge of memory corruption techniques. CWE-416 vulnerabilities often require specific memory layout conditions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: To be specified in Microsoft's security update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62216
Restart Required: Yes
Instructions:
1. Open any Office application
2. Go to File > Account > Update Options
3. Select 'Update Now'
4. Restart Office applications when prompted
5. Alternatively, use Windows Update for system-wide Office updates
🔧 Temporary Workarounds
Disable Office macro execution
windowsPrevents Office documents from executing potentially malicious macros
Set-ItemProperty -Path 'HKCU:\Software\Microsoft\Office\16.0\<Application>\Security' -Name 'VBAWarnings' -Value 2
Use Office Protected View
windowsForce all documents from untrusted sources to open in Protected View
Set-ItemProperty -Path 'HKCU:\Software\Microsoft\Office\16.0\<Application>\Security\ProtectedView' -Name 'DisableInternetFilesInPV' -Value 0
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized Office document execution
- Deploy email filtering to block Office attachments from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Office version against Microsoft's security bulletin for affected versionsCheck Version:
Open any Office app > File > Account > About <Application>Verify Fix Applied:
Verify Office version matches or exceeds patched version specified in Microsoft advisory📡 Detection & Monitoring
Log Indicators:
- Office application crashes with memory access violations
- Unexpected Office child process creation
- Office loading suspicious document templates
Network Indicators:
- Outbound connections from Office processes to unknown IPs
- DNS requests for suspicious domains from Office
SIEM Query:
source="windows" AND (event_id=1000 OR event_id=1001) AND process_name="WINWORD.EXE" OR process_name="EXCEL.EXE" OR process_name="POWERPNT.EXE"