Description of the security update for Office 2016: May 11, 2021 (KB4493197)

Summary

This security update resolves a Microsoft Access Remote Code Execution Vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-28455.

**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 4493197 for the 32-bit version of Office 2016
• Download security update 4493197 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 4486755.

File hash information

File name		SHA256 hash
ace2016-kb4493197-fullfile-x86-glb.exe		EF747565C6F1FA4B5ADD82F436D056607E710290CEC2ADB4A4CA89DAAB1D7DF0
ace2016-kb4493197-fullfile-x64-glb.exe		D6BC88BF5B577E59E5693007826FF78EDBAEFBF67700CC49832F762E26A89F93

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
acecore.dll	acecore.dll	16.0.5161.1001	1700768	21-Apr-21	06:33
acacedao.dll	acedao.dll	16.0.5149.1000	448992	20-Apr-21	05:54
acedao.dll	acedao.dll	16.0.5149.1000	448992	20-Apr-21	05:54
aceerr.dll	aceerr.dll	16.0.5095.1000	50088	20-Apr-21	05:54
acees.dll	acees.dll	16.0.5149.1000	646608	20-Apr-21	05:54
aceexch.dll	aceexch.dll	16.0.5095.1000	203200	20-Apr-21	05:54
aceexcl.dll	aceexcl.dll	16.0.5149.1000	409000	20-Apr-21	05:54
aceodbc.dll	aceodbc.dll	16.0.5095.1000	300008	20-Apr-21	05:54
aceoddbs.dll	aceoddbs.dll	16.0.4684.1000	26472	20-Apr-21	05:54
aceoledb.dll	aceoledb.dll	16.0.5095.1000	340416	20-Apr-21	05:54
acetxt.dll	acetxt.dll	16.0.5095.1000	175016	20-Apr-21	05:54
acexbe.dll	acexbe.dll	16.0.5095.1000	267688	20-Apr-21	05:54
expsrv.dll	expsrv.dll	7.1.1108	333184	20-Apr-21	02:53
vbajet32.dll	vbajet32.dll	7.1.1108	17792	20-Apr-21	02:53

__

For all supported x64-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
acecore.dll	acecore.dll	16.0.5161.1001	2293144	21-Apr-21	06:36
acacedao.dll	acedao.dll	16.0.5095.1000	606192	20-Apr-21	06:02
acedao.dll	acedao.dll	16.0.5095.1000	606192	20-Apr-21	06:02
acees.dll	acees.dll	16.0.5095.1000	906192	20-Apr-21	06:02
aceexch.dll	aceexch.dll	16.0.4759.1000	259480	20-Apr-21	06:02
aceexcl.dll	aceexcl.dll	16.0.5095.1000	545696	20-Apr-21	06:02
aceodbc.dll	aceodbc.dll	16.0.4999.1000	352624	20-Apr-21	06:02
aceoddbs.dll	aceoddbs.dll	16.0.4513.1000	28536	20-Apr-21	06:02
aceoledb.dll	aceoledb.dll	16.0.5083.1000	441264	20-Apr-21	06:02
acetxt.dll	acetxt.dll	16.0.4996.1000	213912	20-Apr-21	06:02
acexbe.dll	acexbe.dll	16.0.4831.1000	326544	20-Apr-21	06:02
expsrv.dll	expsrv.dll	7.1.1108	503680	20-Apr-21	07:04
vbajet32.dll	vbajet32.dll	7.1.1108	20864	20-Apr-21	07:04

Information about protection and security

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