CVE-2025-24083
📋 TL;DR
CVE-2025-24083 is an untrusted pointer dereference vulnerability in Microsoft Office that allows local attackers to execute arbitrary code by exploiting improper memory access. This affects users who open malicious Office documents. Attackers could gain the same privileges as the current user.
💻 Affected Systems
- Microsoft Office
- Microsoft 365 Apps
📦 What is this software?
365 Apps by Microsoft
365 Apps by Microsoft
Office by Microsoft
Office by Microsoft
Office 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 →
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining administrative privileges, data theft, ransomware deployment, and persistent backdoor installation.
Likely Case
Local privilege escalation leading to credential harvesting, lateral movement within the network, and installation of additional malware.
If Mitigated
Limited impact with user-level access only, potentially blocked by application control policies or antivirus.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious document). No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24083
Restart Required: No
Instructions:
1. Open any Office application. 2. Go to File > Account > Update Options > Update Now. 3. Alternatively, use Windows Update for system-wide Office updates. 4. Verify update completion.
🔧 Temporary Workarounds
Disable Office macro execution
WindowsPrevents execution of malicious macros that could trigger the vulnerability
Set Group Policy: Computer Configuration > Administrative Templates > Microsoft Office 2016 > Security Settings > Trust Center > Disable all macros without notification
Use Office Protected View
allOpens documents from untrusted sources in read-only mode
Ensure Protected View is enabled in Trust Center settings
🧯 If You Can't Patch
- Implement application control to block unauthorized Office processes
- Restrict user privileges to prevent local privilege escalation
🔍 How to Verify
Check if Vulnerable:
Check Office version against affected versions in Microsoft advisoryCheck Version:
In Word/Excel: File > Account > About [Application]Verify Fix Applied:
Verify Office version is updated beyond vulnerable versions listed in advisory📡 Detection & Monitoring
Log Indicators:
- Office application crashes with memory access violations
- Unusual child processes spawned from Office applications
- Suspicious document opens from untrusted sources
Network Indicators:
- Outbound connections from Office processes to unknown IPs
- DNS requests for suspicious domains after document open
SIEM Query:
EventID=1000 OR EventID=1001 Source=Office Application AND ExceptionCode=0xc0000005