Description of the security update for Office 2016: November 9, 2021 (KB4486670)

Summary

This security update resolves a Microsoft Excel security feature bypass vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2021-42292.

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?).

How to get and install the update

**Note:**You have to install KB 5002056 together with this 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 4486670 for the 32-bit version of Office 2016
• Download security update 4486670 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: November 9, 2021 (KB5007403).

Security update replacement information

This security update replaces previously released security update 4475514.

File hash information

File name	SHA256 hash
msodll99l2016-kb4486670-fullfile-x86-glb.exe	540D0ABD8629919731454D4F3841D8CFFE0C2DF49167AB3E58A347C73EE758AF
msodll99l2016-kb4486670-fullfile-x64-glb.exe	F8BECCA02B18DC37A3FCC98DCB91D33F2B97D770824D702CB7822EDF8E1E92CA

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
mso99lres.dll	mso99lres.dll	16.0.4684.1000	9501424	21-Oct-21	05:52
mso99lres.dll.x86	mso99lres.dll	16.0.4684.1000	9501424	21-Oct-21	06:00
mso99lwin32client.dll.x64	mso99lwin32client.dll	16.0.5239.1001	8182104	22-Oct-21	11:05
xlsrv.ecs.mso99lwin32client.dll	mso99lwin32client.dll	16.0.5239.1001	8182104
mso99lwin32client.dll.x86	mso99lwin32client.dll	16.0.5239.1001	5875552	22-Oct-21	11:01

__

For all supported x64-based versions of Office 2016

File identifier	File name	File version	File size	Date	Time
conversion.office.mso99lres.dll	mso99lres.dll	16.0.4666.1000	9501416	21-Oct-21	05:53
mso99lres.dll	mso99lres.dll	16.0.4666.1000	9501416	21-Oct-21	05:52
ppt.conversion.mso99lres.dll	mso99lres.dll	16.0.4666.1000	9501416
ppt.edit.mso99lres.dll	mso99lres.dll	16.0.4666.1000	9501416
wac.office.mso99lres.dll	mso99lres.dll	16.0.4666.1000	9501416
mso99lres.dll	mso99lres.dll	16.0.4684.1000	9501424	21-Oct-21	05:52
mso99lres.dll.x86	mso99lres.dll	16.0.4684.1000	9501424	21-Oct-21	06:00
mso99lwin32client.dll.x64	mso99lwin32client.dll	16.0.5239.1001	8182104	22-Oct-21	11:05
xlsrv.ecs.mso99lwin32client.dll	mso99lwin32client.dll	16.0.5239.1001	8182104
mso99lwin32client.dll.x86	mso99lwin32client.dll	16.0.5239.1001	5875552	22-Oct-21	11:01

Information about protection and security

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