Summary

This security update resolves a Microsoft Rich Text edit control information disclosure vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-40454.

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.

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: October 12, 2021 (KB5006940).

Security update replacement information

This security update replaces no previously released security update.

File hash information

File name

SHA256 hash

riched202016-kb4461476-fullfile-x86-glb.exe

EBFC506124114B714F72014C8CE5F0D908D6D1D50CF41110CC458B90350A6508

riched202016-kb4461476-fullfile-x64-glb.exe

8422745E2D21FDADF70BF9A6F42D9FF9D06F0BC5FDFBC13F3F939EAD73068D2E

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.

File identifier

File name

File version

File size

Date

Time

riched20.dll_0001

riched20.dll

16.0.5227.1000

1719136

15-Sep-21

07:39

File identifier

File name

File version

File size

Date

Time

conversion.office.riched20.dll

riched20.dll

16.0.5227.1000

2243936

15-Sep-21

07:39

ppt.conversion.riched20.dll

riched20.dll

16.0.5227.1000

2243936

ppt.edit.riched20.dll

riched20.dll

16.0.5227.1000

2243936

riched20.dll_0001

riched20.dll

16.0.5227.1000

2243936

15-Sep-21

07:39

wac.office.riched20.dll

riched20.dll

16.0.5227.1000

2243936

xlsrv.ecs.riched20.dll

riched20.dll

16.0.5227.1000

2243936

Information about protection and security

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Learn how we guard against cyber threats: Microsoft Security

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