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Summary

This security update resolves a Microsoft SharePoint Server remote code execution vulnerability. To learn more about the vulnerability, see the following security advisories:

Notes: 

  • This is build 16.0.5374.1000 of the security update package.

  • 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

After this security update is installed, requests for documents that have an SPOIndexType value of NULL are no longer sent to Search Content Service.

Known issues in this update

After you install this security update, you may be unable to browse to a SharePoint site if the site has a blocked file type extension in the URL. For more information, see "The URL is invalid" error when you browse to a SharePoint site (KB5023406).

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 Deployments - Security Update Guide.

Security update replacement information

This security update replaces previously released security update 5002305.

File hash information

File name

SHA256 hash

sts2016-kb5002321-fullfile-x64-glb.exe

ECE3C1041C6A7106F09E2AD14B15AE50199ECC6431499ED0875C8D4804DB4B56

File information

Download the list of files that are included in security update 5002321.

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.

Date

Description

January 31, 2023

Added a "Known issues in this update" section to describe an issue that users may experience.

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