CVE-2024-20673: Microsoft Office Remote Code Execution Vulnerability

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-02-13 · updated 2026-08-10
Weakness: CWE-693

Description

Microsoft Office Remote Code Execution Vulnerability

Affected products

Microsoft Excel 2013 Service Pack 1: 2016
Microsoft Office: 2016, 2019
Microsoft Office LTSC for Mac 2021: 2021
Microsoft PowerPoint for Android: 2016
Microsoft Publisher: 2016
Microsoft Skype for Business Server 2019 CU2: 2016
Microsoft Visio: 2016
Microsoft Word for Android: 2016
Microsoft Excel 2016: from 16.0.0.0 before 16.0.5435.1000 — fixed in 16.0.5435.1000
Microsoft Office LTSC 2021: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
Microsoft PowerPoint 2016: from 16.0.0 before 16.0.5435.1000 — fixed in 16.0.5435.1000
Microsoft Publisher 2016: from 16.0.0 before 16.0.5435.1000 — fixed in 16.0.5435.1000
Microsoft Visio 2016: from 16.0.1 before 16.0.5435.1000 — fixed in 16.0.5435.1000
Microsoft Word 2016: from 16.0.1 before 16.0.5435.1000 — fixed in 16.0.5435.1000
Microsoft Office: from 16.0.0 before 16.0.5435.1001 — fixed in 16.0.5435.1001
Microsoft Skype for Business 2016: before 16.0.5435.1000 — fixed in 16.0.5435.1000

How to fix

Upgrade to a fixed version: Microsoft Excel 2016 16.0.5435.1000; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft PowerPoint 2016 16.0.5435.1000; Microsoft Publisher 2016 16.0.5435.1000; Microsoft Visio 2016 16.0.5435.1000; Microsoft Word 2016 16.0.5435.1000; Microsoft Office 16.0.5435.1001; Microsoft Skype for Business 2016 16.0.5435.1000. Check the vendor advisory for mitigations.

References

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