Summary
Important:Â
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If you're running 2013-type workflows, you mustinstall the August 2025 update for SharePoint Workflow Manager​​​​​​​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 must enable the debug flag to continue using it. ​​​​​​​$farm = Get-SPFarm
$farm.ServerDebugFlags.Add(53601)
$farm.update()
iisreset
This security update resolves Microsoft SharePoint Server spoofing vulnerability. To learn more about the vulnerability, see Microsoft Common Vulnerabilities and Exposures CVE-2026-​​​​20945.
Notes:Â
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This is build 16.0.10417.20114Â of the security update package.
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To apply this security update, you must have the release version of Microsoft SharePoint Server 2019 installed on the computer.
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 5002847.
File hash information
|
File name |
SHA256 hash |
|
|---|---|---|
|
wssloc2019-kb5002856-fullfile-x64-glb.exe |
12B430D8723AE015D044C82254527E9B70C7A50C0F26E063B8423B1013276A1A |
File information
Download the list of files that are included in security update 5002856.
Information about protection and security
Protect yourself online: Windows Security support
Learn how we guard against cyber threats: Microsoft Security
