This security update resolves a Microsoft SharePoint Server remote code execution vulnerability and Microsoft SharePoint Server spoofing vulnerability. To learn more about the 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
SharePoint Custom Tiles
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 fixes for the following nonsecurity issues in SharePoint Server 2016:
Fixes an issue in which the Update-SPMachineKey and Set-SPMachineKey commands do not work as expected in SharePoint Server 2016 PowerShell.
Fixes an issue in which you receive a "Type not allowed" error message when you try to restore a search service application after you install the May 2021 updates for SharePoint Server.
Fixes an issue in which the property restriction type of search queries that uses the equal operator (such as title=R123) no longer returns search results.
Note: To fix this issue completely, you have to install KB 5002059 together with this update.
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.
Security update deployment information
For deployment information about this update, see Security update deployment information: December 14, 2021 (KB5008541).
Security update replacement information
This security update replaces previously released security update 5002029.
File hash information
Download the list of files that are included in security update 5002055.
Information about protection and security
Protect yourself online: Windows Security support
Learn how we guard against cyber threats: Microsoft Security