This cumulative update for Windows 11, version 26H1 (KB5089548) includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release.
Visit the Windows release health dashboard for the latest status on this release.
Improvements
This update includes new features and quality improvements that were part of the following update:
This update addresses security vulnerabilities documented in the following guide:
The following summary outlines key quality improvements addressed by this update. The bold text within the brackets indicates the item or area of the change.
- [Connectivity] This update improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.
- [Gaming] This update improves compatibility for some games that use embedded web content and helps reduce the impact of JavaScript errors on in‑game features.
If you've already installed previous updates, your device will download and install only the new updates included in this package.
AI Components
This release updates the following AI components:
| AI Component |
Version |
| Image Search |
1.2603.377.0 |
| Content Extraction |
1.2603.377.0 |
| Semantic Analysis |
1.2603.377.0 |
| Settings Model |
1.2603.377.0 |
Windows 11 servicing stack update (KB5092761)- 28000.2103
This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.
Known issues in this update
Microsoft is not currently aware of any issues with this update.
How to get this update
Before you install this update
Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates.
Install this update
To install this update, use one of the following Windows and Microsoft release channels.
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This update downloads and installs automatically from Windows Update and Microsoft Update. |
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This update downloads and installs automatically from Windows Update for Business in accordance with configured policies. |
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To install this release from the Microsoft Update Catalog, follow these instructions:
Before you install this update, the standalone package(s) for this update is available from the Microsoft Update Catalog website. This KB contains one or more MSU files that require installation in a specific order.
You can install this update using Method 1 (install all MSU files together) or Method 2 (install each MSU file individually, in order).
Method 1: Install all MSU files together
Download all MSU files for KB5089548 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed.
Updating Windows PC
To apply this update to a running Windows PC, run the following command from an elevated Command Prompt:
DISM /Online /Add-Package /PackagePath:c:\packages\windows11.0-kb5089548-arm64_0513b9fd796d6e894c82811d01f216ba9fc8d323.msu
Or, run the following command from an elevated Windows PowerShell prompt:
Add-WindowsPackage -Online -PackagePath "c:\packages\windows11.0-kb5089548-arm64_0513b9fd796d6e894c82811d01f216ba9fc8d323.msu "
Or use Windows Update Standalone Installer to install the target update.
Updating Windows Installation media
To apply this update to Windows Installation media, see Update Windows installation media with Dynamic Update.
Note: When downloading other Dynamic Update packages, ensure they match the same month as this KB. If the SafeOS Dynamic Update or Setup Dynamic Update is not available for the same month as this KB, use the most recently published version of each.
To add this update to a mounted image, run the following command from an elevated Command Prompt:
DISM /Image:mountdir /Add-Package /PackagePath:Windows11.0-kb5089548-arm64_0513b9fd796d6e894c82811d01f216ba9fc8d323.msu
Or, run the following command from an elevated Windows PowerShell prompt:
Add-WindowsPackage -Path "c:\offline" -PackagePath "Windows11.0-kb5089548-arm64_0513b9fd796d6e894c82811d01f216ba9fc8d323.msu" -PreventPending
Method 2: Install each MSU file individually, in order
Download and install each MSU file individually (if there are more than one .msu file) either using DISM or Windows Update Standalone Installer in the following order:
- windows11.0-kb5089548-arm64_0513b9fd796d6e894c82811d01f216ba9fc8d323.msu
Note: This latest cumulative update includes updates for AI components. Even though the AI component updates are included in the update, the AI components are only applicable to Windows Copilot+ PCs and will not install on Windows PC or Windows Server.
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This update automatically syncs with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows:
Product: Windows 11
Classification: Security Updates |
Note
- If you want to remove this update
- Before you decide to remove this update, see Understanding the risks: Why you should not uninstall security updates.
- To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
- Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.
File information
For a list of the files provided in this update, download the file information for cumulative update 5089548.
For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5092761) - version 28000.2103.
Windows monthly updates explained
Description of the standard terminology used for Microsoft software updates
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