What is CVE-2021-34478?

CVE-2021-34478 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft Office Remote Code Execution Vulnerability

Which CVE IDs does CVE-2021-34478 cover?

CVE-2021-34478 covers the following CVE IDs: CVE-2021-34478. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2021-34478?

CVE-2021-34478 has a CVSS v3 base score of 7.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2021-34478?

CVE-2021-34478 affects 4 products, including: Microsoft 365 Apps for Enterprise for 32-bit Systems; Microsoft 365 Apps for Enterprise for 64-bit Systems; Microsoft Office 2019 for 32-bit editions; Microsoft Office 2019 for 64-bit editions.

CVE-2021-34478HighCVSS 7.8

Microsoft Office Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

August 10, 2021

Last Modified

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🔗 CVE IDs covered (1)

CVE-2021-34478 →

📋 Description

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? A user needs to be tricked into running malicious files.

Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector.

🎯 Affected products4

Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions

✅ Remediation

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

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34478
referencehttps://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates