CVE-2025-24057
📋 TL;DR
A heap-based buffer overflow vulnerability in Microsoft Office allows attackers to execute arbitrary code on vulnerable systems by tricking users into opening malicious documents. This affects all users running unpatched versions of Microsoft Office. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Microsoft Office
- Microsoft 365 Apps
📦 What is this software?
365 Apps 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
Complete system takeover with administrative privileges, data theft, ransomware deployment, and lateral movement across the network.
Likely Case
Local privilege escalation leading to data exfiltration, credential harvesting, and installation of persistent backdoors.
If Mitigated
Limited impact due to application sandboxing, memory protection mechanisms, and restricted user privileges.
🎯 Exploit Status
Exploitation requires user interaction to open malicious Office document. No known public exploits at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: February 2025 security update
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24057
Restart Required: No
Instructions:
1. Open any Office application. 2. Go to File > Account > Update Options > Update Now. 3. For enterprise deployments, deploy the February 2025 security update via Microsoft Update or WSUS.
🔧 Temporary Workarounds
Block Office file types via email filtering
allConfigure email gateways to block or quarantine Office documents from untrusted sources
Enable Protected View
allEnsure Protected View is enabled for documents from the internet
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized Office document execution
- Deploy endpoint detection and response (EDR) solutions with behavioral monitoring for Office processes
🔍 How to Verify
Check if Vulnerable:
Check Office version via File > Account > About [Application]. If version is older than February 2025 update, system is vulnerable.Check Version:
wmic product where "name like 'Microsoft Office%'" get versionVerify Fix Applied:
Verify Office version shows February 2025 update installed. Check Windows Update history for KB5000000+ updates.📡 Detection & Monitoring
Log Indicators:
- Office application crashes with heap corruption errors
- Unusual Office child process creation
- Office spawning unexpected processes like cmd.exe or powershell.exe
Network Indicators:
- Office processes making unexpected outbound connections
- DNS requests for suspicious domains from Office processes
SIEM Query:
source="windows" AND (process_name="winword.exe" OR process_name="excel.exe" OR process_name="powerpnt.exe") AND (event_id="1000" OR event_id="1001") AND message="heap"