Description of the security update for Office 2016: May 11, 2021 (KB5001923)

Summary

This security update resolves a Microsoft Excel remote code execution vulnerability and Microsoft Office information disclosure vulnerability. To learn more about the vulnerabilities, see the following security advisories:

• Microsoft Common Vulnerabilities and Exposures CVE-2021-31174
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31175
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31178
• Microsoft Common Vulnerabilities and Exposures CVE-2021-31179

**Note:**To apply this security update, you must have the release version of Microsoft Office 2016 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn’t apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?).

How to get and install the update

Method 1: Microsoft Update

This update is available from Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to get security updates automatically, see Windows Update: FAQ.

Method 2: Microsoft Update Catalog

To get the standalone package for this update, go to the Microsoft Update Catalog website.

Method 3: Microsoft Download Center

You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

• Download security update 5001923 for the 32-bit version of Office 2016
• Download security update 5001923 for the 64-bit version of Office 2016

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: May 11, 2021.

Security update replacement information

This security update replaces previously released security update 4504724.

File hash information

File name		SHA256 hash
graph2016-kb5001923-fullfile-x86-glb.exe		BB54A9BCF0EA6E9EA16E0B4AAC1E44C80C3930E2191A78CD3C39BB7E7746C9E7
graph2016-kb5001923-fullfile-x64-glb.exe		4AD2E989BC32C554B949B77F31DE87BD8264F7BB4B00A6971642FAC6C2EA2DB9

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

__

For all supported x86-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
graph.exe	graph.exe	16.0.5161.1000	4420472	15-Apr-21	03:18

__

For all supported x64-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
graph.exe	graph.exe	16.0.5161.1000	5731704	15-Apr-21	03:22

Information about protection and security

Protect yourself online: Windows Security supportLearn how we guard against cyber threats: Microsoft Security