KB5126027: Setup Dynamic Update for Windows Server 2025: September 8, 2026

適用先

Windows Server 2025

Summary

This update addresses security vulnerabilities in Windows setup binaries or any files that setup uses for feature updates in Windows Server 2025.

To install this update, use one of the following release channels.

Available	Next step
	This update is available through Windows Update. It will be downloaded and installed automatically.

Available	Next step
	To get the standalone package for this update, go to the Microsoft Update Catalog website. To download updates from the Update Catalog, see Steps to download updates from the Windows Update Catalog.

Available	Next step
	This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows: Product: Microsoft Server operating system-24H2 Classification: Update To set up your WSUS server to sync based on products and classifications, see Synchronizing Update by Product and Classification. To manually import updates into WSUS, see Import updates into WSUS by using PowerShell.

Available

Next step

This update will automatically sync with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows:

To set up your WSUS server to sync based on products and classifications, see Synchronizing Update by Product and Classification.

To manually import updates into WSUS, see Import updates into WSUS by using PowerShell.

Item	Details
Prerequisites	There are no prerequisites to apply this update.
Restart information	You do not have to restart your computer after you apply this update.
Update replacement information	This update replaces the previously released update KB5095966.
File information	A list of the files that are included in this update are provided in a CSV (Comma delimited) (.csv) file. The file can be opened in a text editor such as Notepad or in Microsoft Excel. Note:* The English (United States) version of this software update might contain files for additional languages. Download the file information for update KB5126027.

Query words: Setup DU