Description of the security update for SharePoint Server 2016: August 11, 2026 (KB5002905)

Applies To
SharePoint Server 2016

Summary

Important

  • If you're currently running SharePoint Workflow Manager, you must install the SharePoint Workflow Manager (KB5002799) to your farm before you install this cumulative update.
  • If you're currently running the Classic version of Workflow Manager, you have to enable the debug flag in order to continue using Workflow Manager:
      $farm = Get-SPFarm
      $farm.ServerDebugFlags.Add(53601)
      $farm.update()
      iisreset

This security update resolves a Microsoft SharePoint Server Elevation of Privilege vulnerability, Microsoft Office Information Disclosure vulnerability, Microsoft SharePoint Server Spoofing vulnerability, Microsoft SharePoint Remote Code Execution vulnerability, and Microsoft SharePoint Server Tampering vulnerability To learn more about the vulnerabilities, see the following security advisories:

Note

  • This is build 16.0.5561.1001 of the security update package.
  • To apply this security update, you must have the release version of Microsoft SharePoint 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 Learn articles: n

Improvements and fixes

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

  • Fixes an issue in which workflow status links break on the WrkStat.aspx page.

  • Fixes an issue in which Distributed Cache (DCache) does not work after the July 2026 Public Update is installed.

  • Adds an advisory for SharePoint 2013 workflows.

  • Notifies that orphaned Remote Event Receivers (RERs) that do not have an app identifier will be blocked starting with the November 2026 Public Update. Use the Get-SPOrphanedRemoteEventReceiver cmdlet to identify affected RERs.

  • Notifies that the ToolPane feature will be disabled starting with the September 2026 Public Update. Use the Enable-SPToolPane cmdlet to enable ToolPane for a site collection.

  • Disables the ExecuteProxyUpdates feature. Use the Enable-SPWebPartPagesProxyUpdates cmdlet to enable the feature for a site collection, or the Disable-SPWebPartPagesProxyUpdates cmdlet to disable it immediately.

  • Notifies that OWA web part Exchange autodiscovery will be disabled starting with the August 2026 Public Update. Use the Enable-SPOWAWebPartAutodiscovery cmdlet to enable the feature for a web application.

  • Notifies that the SharePoint 2010 Workflow feature will be disabled starting with the September 2026 Public Update. Use the Enable-SPLegacyWorkflow cmdlet to enable the feature for a site collection.

  • Disables file-backed Business Data Connectivity (BDC) model import by default to improve security. Use the Enable-BdcmFileImport PowerShell cmdlet to enable this functionality for a site collection.

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 5002891.

File hash information

File name SHA256 hash
sts2016-kb5002905-fullfile-x64-glb.exe E931F4FE6C4CB8CE98F530753C3D8D31DD5A2D887E9D4EA5B45124EFC26395CE

File information

Download the list of files that are included in security update 5002905

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security