Description of the security update for Office 2010: April 13, 2021 (KB4504738)

Summary

This security update resolves a Microsoft Office remote code execution vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-28449.

**Note:**To apply this security update, you must have the release version of Service Pack 2 for Office 2010 installed on the computer.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2010. It doesn’t apply to the Office 2010 Click-to-Run editions, such as Microsoft Office 2010 Home and Student (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 4504738 for the 32-bit version of Office 2010
• Download security update 4504738 for the 64-bit version of Office 2010

More information

Security update deployment information

For deployment information about this update, see Security update deployment information: April 13, 2021 (KB5001866).

Security update replacement information

This security update replaces previously released security update 4504703.

File hash information

File name	SHA1 hash	SHA256 hash
mso2010-kb4504738-fullfile-x86-glb.exe	13F02384D11B64DEF5DAB3D0F5E91CF33AA32A0F	EAB6F768FC7FA5D7C1C4027483C67E8F799B9B2317035497EAEE7AC7B9709CFF
mso2010-kb4504738-fullfile-x64-glb.exe	18FA6A66C3A9BBAB1FAD91E5B63B34AAF3B888D0	8F91A712C7CDEAED36C05EA776DDC14ABEBA6DFACBE69D516245733CFD196ADF

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.

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For all supported x86-based versions of Office 2010

File identifier	File name	File version	File size	Date	Time
mso.dll.x86	mso.dll	14.0.7268.5000	18,482,384	16-Mar-2021	08:31

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For all supported x64-based versions of Office 2010

File identifier	File name	File version	File size	Date	Time
mso.dll.x64	mso.dll	14.0.7268.5000	24,368,336	16-Mar-2021	08:38
mso.dll.x86	mso.dll	14.0.7268.5000	18,482,384	16-Mar-2021	08:31

Information about protection and security

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