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CVE Number Vulnerability Product Severity Date
CVE-2026-20944 Microsoft Word Remote Code Execution Vulnerability Microsoft 365, Microsoft Office Critical 29-01-2026

Technical Information

An unauthenticated attacker could achieve remote code execution by convincing a user to open a specially crafted malicious file, triggering an out-of-bounds read that allows arbitrary code execution locally on the victim system.

Patch release date: Jan 13, 2026
Further information on this vulnerability is available at : CVE-2026-20944

Affected Software

Microsoft 365 Apps for Enterprise for 32-bit Systems,
Microsoft 365 Apps for Enterprise for 64-bit Systems,
Microsoft Office LTSC for Mac 2021,
Microsoft Office LTSC for Mac 2024