Description of the security update for SharePoint Enterprise Server 2016: December 8, 2020 (KB4486753)

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 the following security advisories:

• Microsoft Common Vulnerabilities and Exposures CVE-2020-17089

• Microsoft Common Vulnerabilities and Exposures CVE-2020-17115

• Microsoft Common Vulnerabilities and Exposures CVE-2020-17118

• Microsoft Common Vulnerabilities and Exposures CVE-2020-17120

• Microsoft Common Vulnerabilities and Exposures CVE-2020-17121

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:

• New features included in the November 2016 Public Update for SharePoint Server 2016 (Feature Pack 1)

• New features included in the September 2017 Public Update for SharePoint Server 2016 (Feature Pack 2)

Known issue in this update

Web Parts that depend on WPProperty don't work correctly. To fix this issue, install KB 5001946.

Improvements and fixes

This security update contains fixes for the following nonsecurity issues in SharePoint Server 2016:

• Fixes the failures that occur when you upload files larger than 100 MB through dragging and dropping.

• Fixes an issue in which the English version of Word Breaker incorrectly breaks currency such as "P1038615 GRD." This prevents users from searching on this item.

• Fixes an issue in which copying and pasting in a list in Quick Edit mode doesn't work for modern browsers.

• Fixes an issue in which the left pane is hidden if users change some Search Admin settings in a Search Service Application.

• Fixes an issue in which Business Connectivity Services (BCS) crawls of the .NET connectivity assemblies, web services, or custom type don't work.

• Fixes an issue in which an in-place search returns empty result when searching content within a subfolder of a document library or list items within a subfolder of a list in classic view.

This security update contains the following improvement and fix in Project Server 2016:

• Improves performance on timesheet actions, such as saving and submitting.

• Fix: When a cost resource is assigned to a milestone task and the project is scheduled through a REST or client-side object model (CSOM) call, the calculation fails and generates an error message that includes the text, "Cannot extend beyond minimum date."

How to get and install the update

More information

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security

Change history

 The following table summarizes some of the most important changes to this topic.