Description of the security update for Excel 2016: October 13, 2020

Applies to: Excel 2016


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 the following security advisories:

Note To apply this security update, you must have the release version of Excel 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 issues:
  • Fixes an issue in which Excel sometimes stops responding when it calculates printer information.

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 13, 2020.

Security update replacement information

This security update replaces previously released security update 4484507.

File hash information

File name SHA1 hash SHA256 hash
excel2016-kb4486678-fullfile-x86-glb.exe CF1620AE687C0C1BC009C1CBE7D7FC5FAFD69454 EAD434AF8462E4F7C97A2F6266F0060C4F340E08E58F709446D750E420355F62
excel2016-kb4486678-fullfile-x64-glb.exe FDBC4BDFB88DE516EEC400EFE82DC1743E777E84 CF06F83BC11991D7BF95EFC93927208F6C217C65E008AD870D814ECF724CE76F

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.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security