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Description of the security update for SharePoint Server 2019 Language Pack: December 9, 2025 (KB5002802)
Applies To
SharePoint Server 2019
Important:
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.
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 Excel Information Disclosure vulnerability and Microsoft Word Remote Code Execution vulnerability. To learn more about the vulnerabilities, see the following security advisories:
Microsoft Common Vulnerabilities and Exposures CVE-2025-62562
Microsoft Common Vulnerabilities and Exposures CVE-2025-62559
Microsoft Common Vulnerabilities and Exposures CVE-2025-62558
Microsoft Common Vulnerabilities and Exposures CVE-2025-62555
Notes:
This is build 16.0.10417.20075 of the security update package.
To apply this security update, you must have the release version of Microsoft SharePoint Server 2019 installed on the computer.
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.
To get the standalone package for this update, go to the Microsoft Update Catalog website.
You can get the standalone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.
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