Microsoft Addresses Critical CVE-2025-39746 Vulnerability in Multiple Products

Microsoft has released security updates to address a critical vulnerability affecting multiple products. CVE-2025-39746 could allow remote code execution with no user interaction required. Organizations must apply patches immediately.

Impact Assessment

This vulnerability has a CVSS score of 8.8. Attackers could exploit this vulnerability without authentication. No user interaction is required for successful exploitation. The vulnerability exists in multiple Microsoft products including Windows Server, Office applications, and development tools.

Technical Details

CVE-2025-39746 is a buffer overflow vulnerability in the Microsoft Graphics Component. The issue stems from improper handling of specially crafted image files. When processing these files, the application fails to properly validate input, allowing arbitrary code execution.

The vulnerability affects:

• Windows 10 (versions 1903, 1909, 2004, 20H2, 21H1, 21H2)
• Windows 11 (21H2, 22H2)
• Microsoft Office 2019, 2021
• Microsoft Office LTSC 2021
• Microsoft 365 Apps

Mitigation Steps

Microsoft has released security updates in their December 2025 Security Updates. Organizations should:

1. Apply the security updates immediately
2. Ensure automatic updates are enabled
3. Restrict network access to affected systems
4. Implement application control policies

Timeline

The vulnerability was privately reported to Microsoft on November 15, 2025. Security updates were released on December 8, 2025. No known public exploits exist at this time. Microsoft rates the exploitability as "Exploitation Less Likely" based on current analysis.

Additional Resources

• Microsoft Security Advisory
• Affected Software List
• Mitigation Workarounds

Organizations experiencing issues with the updates should contact Microsoft Support. Additional guidance is available through the Microsoft Security Response Center.