What is CVE-2026-20944?

CVE-2026-20944 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft Word Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-20944 cover?

CVE-2026-20944 covers the following CVE IDs: CVE-2026-20944. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-20944?

CVE-2026-20944 has a CVSS v3 base score of 8.4, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-20944?

CVE-2026-20944 affects 4 products, including: 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.

CVE-2026-20944CriticalCVSS 8.4

Microsoft Word Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-20944 →

📋 Description

Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to execute code locally.

🎯 Affected products4

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

✅ Remediation

KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KBRelease Notes (Security Update) — fixed build 16.105.26011018

🔗 References (3)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20944
referencehttps://docs.microsoft.com/en-us/officeupdates/office365-proplus-security-updates
patchhttps://go.microsoft.com/fwlink/p/?linkid=831049