Summary
Important:
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If you're currently running SharePoint Workflow Manager, you must install SharePoint Workflow Manager (KB5002799) to your farm before you install this cumulative update.
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If you're currently running the Classic version of Workflow Manager, you have to enable the debug flag in order to continue using it:$farm = Get-SPFarm
$farm.ServerDebugFlags.Add(53601)
$farm.update()
iisreset
This security update resolves a Microsoft Word spoofing vulnerability and Microsoft Outlook spoofing vulnerability. To learn more about the vulnerabilities, see the following security advisories:
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Microsoft Common Vulnerabilities and Exposures CVE-2026-21511
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Microsoft Common Vulnerabilities and Exposures CVE-2026-21260
Notes:
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This is build 16.0.19127.20518 of the security update package.
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To apply this security update, you must have the release version of Microsoft SharePoint Server Subscription Edition installed on the computer.
Improvements and fixes
This security update introduces the SharePoint Server Subscription Edition Version 25H2 feature update. This feature update will be included in all SharePoint Server Subscription Edition public updates going forward. For more information about this feature update, see New and improved features in SharePoint Server Subscription Edition Version 25H2.
This security update contains improvements and fixes for the following nonsecurity issues in SharePoint Server Subscription Edition:
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Restricts the People Picker to authorized users by excluding the "Everyone" claim through configurable access control settings. For example:$webApp.PeoplePickerSettings.ExcludeEveryoneClaim = $true The default setting is False.
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Fixes an issue that blocks zero downtime updating.
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Fixes an issue in which the SharePoint worker processes fail and return error 0xC0000409 on sites that have Calendar lists.
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Fixes an accessibility issue in which the discernible text isn't available for checkbox and expandable controls under the Site pages heading.
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Fixes an issue in which the SharePoint 2010 style workflow doesn't run in the SharePoint Timer Service.
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Fixes the repeated failures of w3wp process that are caused by missing Dynamic Link Libraries (DLL).
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Fixes an issue in which the "Timer Service Recycle" job is nonfunctional due to dependency on the removed STSADM.EXE.
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Fixes an issue in which the PDF upload in SharePoint Server Subscription Edition (SPSE) causes the w3wp process to stop responding.
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Fixes an issue in which certain SharePoint pages fail to render.
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 5002822.
File hash information
|
File name |
SHA256 hash |
|---|---|
|
uber-subscription-kb5002833-fullfile-x64-glb.exe |
0210E2957DA9FEAC03E2F38863B169DD84FBE1050316C400747495B9D9302A49 |
File information
Download the list of files that are included in Security Update 5002833.
Information about protection and security
Protect yourself online: Windows Security support
Learn how we guard against cyber threats: Microsoft Security
