Description of the security update for Office 2016: January 12, 2021

Summary

This security update resolves vulnerabilities in Microsoft Office that could allow remote code execution if a user opens a specially crafted Office file. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2021-1711.

Note To apply this security update, you must have the release version of 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?).

Improvements and fixes

This security update contains a fix for the following nonsecurity issue:

• Applications that use the ACEOLEB provider might stop responding when they try to open a connection.

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 4486755 for the 32-bit version of Office 2016
• Download security update 4486755 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: January 12, 2021.

Security update replacement information

This security update replaces previously released security update 4484508.

File hash information

File name	SHA1 hash	SHA256 hash
ace2016-kb4486755-fullfile-x86-glb.exe	8185B59236CFF63969E60CA8B2451B3E5CE90880	931131A4F591D150928205CF6F81882E5CA6EC9860F163C2CC5F47F20B51C0A0
ace2016-kb4486755-fullfile-x64-glb.exe	EC8E449D0C9A8F8EF7DECAE040F8609DA9B53D31	06ADCD688D17563AE2CD228C2CA7D40953F242D98AE18CECD7ADE9182D9EDDF4

File informationThe 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 2016

File identifier	File name	File version	File size	Date	Time
acecore.dll	acecore.dll	16.0.5110.1000	1700232	16-Dec-20	08:12
acacedao.dll	acedao.dll	16.0.5095.1000	448496	15-Dec-20	06:26
acedao.dll	acedao.dll	16.0.5095.1000	448496	15-Dec-20	06:26
aceerr.dll	aceerr.dll	16.0.5095.1000	50088	15-Dec-20	06:26
acees.dll	acees.dll	16.0.5095.1000	676312	15-Dec-20	06:26
aceexch.dll	aceexch.dll	16.0.5095.1000	203200	15-Dec-20	06:26
aceexcl.dll	aceexcl.dll	16.0.5095.1000	414120	15-Dec-20	06:26
aceodbc.dll	aceodbc.dll	16.0.5095.1000	300008	15-Dec-20	06:26
aceoddbs.dll	aceoddbs.dll	16.0.4684.1000	26472	15-Dec-20	06:26
aceoledb.dll	aceoledb.dll	16.0.5095.1000	340416	15-Dec-20	06:26
acetxt.dll	acetxt.dll	16.0.5095.1000	175016	15-Dec-20	06:26
acexbe.dll	acexbe.dll	16.0.5095.1000	267688	15-Dec-20	06:26
expsrv.dll	expsrv.dll	7.1.1104	333192	15-Dec-20	09:22
vbajet32.dll	vbajet32.dll	7.1.1104	17800	15-Dec-20	09:22

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For all supported x64-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
acecore.dll	acecore.dll	16.0.5110.1000	2292616	16-Dec-20	08:12
acacedao.dll	acedao.dll	16.0.5095.1000	606192	15-Dec-20	06:48
acedao.dll	acedao.dll	16.0.5095.1000	606192	15-Dec-20	06:48
acees.dll	acees.dll	16.0.5095.1000	906192	15-Dec-20	06:48
aceexch.dll	aceexch.dll	16.0.4759.1000	259480	15-Dec-20	06:48
aceexcl.dll	aceexcl.dll	16.0.5095.1000	545696	15-Dec-20	06:48
aceodbc.dll	aceodbc.dll	16.0.4999.1000	352624	15-Dec-20	06:48
aceoddbs.dll	aceoddbs.dll	16.0.4513.1000	28536	15-Dec-20	06:48
aceoledb.dll	aceoledb.dll	16.0.5083.1000	441264	15-Dec-20	06:48
acetxt.dll	acetxt.dll	16.0.4996.1000	213912	15-Dec-20	06:48
acexbe.dll	acexbe.dll	16.0.4831.1000	326544	15-Dec-20	06:48
expsrv.dll	expsrv.dll	7.1.1104	503672	15-Dec-20	09:16
vbajet32.dll	vbajet32.dll	7.1.1104	20872	15-Dec-20	09:16

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