Description of the security update for SharePoint Server Subscription Edition: September 08, 2026 (KB5002908)

Applies To
SharePoint Server Subscription Edition

Summary

Important

  • If you're currently running SharePoint Workflow Manager, you must install 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 Information Disclosure, Microsoft SharePoint Server Remote Code Execution vulnerability, Microsoft SharePoint Server Spoofing vulnerability, Microsoft Word Remote Code Execution vulnerability, Microsoft SharePoint Server Security Feature Bypass vulnerability, and Microsoft SharePoint Elevation of Privilege vulnerability. To learn more about the vulnerabilities, see the following security advisories:

Note

  • This is build 16.0.20326.20124 of the security update package.
  • To apply this security update, you must have the release version of Microsoft SharePoint Server Subscription Edition installed on the computer.

Improvements and fixes

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

  • The GetDataFromDataSourceControl SOAP feature will be disabled starting in the September 2026 Cumulative Update. To enable the feature for a site collection, use the Enable-SPWebPartPagesDataSourceControl cmdlet. To disable the feature when it's no longer required, use the Disable-SPWebPartPagesDataSourceControl cmdlet.

  • Fixes an issue in which using PowerShell, timer jobs, or profile synchronization to update user profile pictures fails and returns a "Url is not safe" error message.

  • Closing the Search Filters panel now returns keyboard focus to the Filters button.

  • Fixes an issue in which the screen flickers when you scroll through or edit a page in certain browsers.

  • The ExecuteProxyUpdates feature will be disabled starting in the September 2026 Cumulative Update. To enable the feature for a site collection, use the Enable-SPWebPartPagesProxyUpdates cmdlet. To disable the feature immediately, use the Disable-SPWebPartPagesProxyUpdates cmdlet. To view all site collections for which the feature is enabled, use the Get-SPWebPartPagesProxyUpdatesEnabledSites cmdlet.

  • Notifies that the SharePoint 2010 Workflow feature will be disabled starting with the September 2026 Cumulative Update. To enable the feature for a site collection, use the Enable-SPLegacyWorkflow cmdlet. To disable the feature, use the Disable-SPLegacyWorkflow cmdlet. To view all site collections for which the feature is enabled, use the Get-SPLegacyWorkflowEnabledSites cmdlet.

  • Notifies that the ToolPane feature will be disabled starting with the September 2026 Cumulative Update. To enable the feature for a site collection, use the Enable- SPToolPane cmdlet. To disable the feature, use the Disable- SPToolPane cmdlet. To view all site collections for which the feature is enabled, use the Get- SPToolPaneEnabledSites cmdlet.

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 5002893.

File hash information

File name SHA256 hash
uber-subscription-kb5002908-fullfile-x64-glb.exe B5EC548C433D5716268A3CAEF3E82A234E9B5188C397E6F919FB21D1C11C00BD

File information

Download the list of files that are included in Security Update 5002908

Information about protection and security

Protect yourself online: Windows Security support

Learn how we guard against cyber threats: Microsoft Security