What is CVE-2026-64920?

CVE-2026-64920 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Access Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-64920 cover?

CVE-2026-64920 covers the following CVE IDs: CVE-2026-64920. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-64920?

CVE-2026-64920 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-64920?

CVE-2026-64920 affects 10 products, including: Microsoft 365 Apps for Enterprise for 32-bit Systems; Microsoft 365 Apps for Enterprise for 64-bit Systems; Microsoft Access 2016 (32-bit edition); Microsoft Access 2016 (64-bit edition); Microsoft Office 2019 for 32-bit editions; and others — see the full list on the advisory page.

CVE-2026-64920HighCVSS 7.8

Microsoft Access Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 14, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-64920 →

📋 Description

Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code locally.

🎯 Affected products10

Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Access 2016 (32-bit edition)
Microsoft Access 2016 (64-bit edition)
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft Office LTSC 2021 for 64-bit editions
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2024 for 64-bit editions

✅ Remediation

KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KB5002832 (Security Update) — fixed build 16.0.5565.1000

🔗 References (4)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64920
referencehttps://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108771
referencehttps://support.microsoft.com/help/5002832