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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 Microsoft SharePoint Enterprise Server 2016 installed on the computer.

This public update delivers Feature Pack 2 for SharePoint Server 2016. Feature Pack 2 contains the following feature:

  • SharePoint Framework (SPFx)

This public update also delivers all the features that were included in Feature Pack 1 for SharePoint Server 2016, including:

  • Administrative Actions Logging

  • MinRole enhancements

  • SharePoint Custom Tiles

  • Hybrid Taxonomy

  • OneDrive API for SharePoint on-premises

  • OneDrive for Business modern user experience (available to Software Assurance customers)

The OneDrive for Business modern user experience requires an active Software Assurance contract at the time that the experience is enabled, either by installation of the public update or by manual enablement. If you don't have an active Software Assurance contract at the time of enablement, you must turn off the OneDrive for Business modern user experience.

For more information, see the following Microsoft Docs articles:

Improvements and fixes

This security update contains improvements and fixes for the following nonsecurity issues:

  • Fixes an issue in which the custom code fails to retrieve SharePoint data through Content Management Interoperability Services (CMIS) REST queries.

  • Fixes an issue in which the "shared with other users" context menu in subfolders doesn't work in classic view.

    Note To fix this issue completely, you have to install KB 4484512 together with this update.

  • Fixes an issue in which a file is uploaded to the wrong folder in classic view of OneDrive for Business.

    Note To fix this issue completely, you have to install KB 4484512 together with this update.

  • Fixes a hit highlighting issue that causes query suggestion token duplication or triplication for German compound words.

  • Fixes an issue in which resolving a single space in the People Picker generates "all users (Windows)."

  • Fixes an issue in which multiple items are added to the list when you add a new item to a list and click Save multiple times on the Ribbon.

  • Fixes an issue in which multiple columns or rows can't be copied from Excel tables to the list in Quick Edit view.

  • Fixes an issue that generates a high CPU cost when you call search API on an extended web application.

  • Fixes an issue in which the library setting that should force opening a document in Word is not honored in classic experience when you use browsers other than Internet Explorer or legacy Edge.

Known issues in this update

  • Issue 1

    An error occurs when you try to access the “Result Sources,” “Query Rules,” “Search Result Sources,” or “Search Query Rules” page from the Search Settings section of Site Settings


    To resolve this issue, install KB 4486677.

  • Issue 2

    After you install this update, some SharePoint ghosted pages don't render, and will generate error messages.


    To resolve this issue, see KB 4584132.

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: September 8, 2020.

Security update replacement information

This security update replaces previously released security update 4484473.

File hash information

File name

SHA1 hash

SHA256 hash




File information

Download the list of files that are included in security update 4484506.

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

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