March 13, 2026—Hotpatch KB5084597 (OS Builds 26200.7982 and 26100.7982) Out-of-band

This update for Windows 11, version 25H2 and 24H2 (KB5084597) incudes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates.

To view the latest updates about this release, visit the Windows release health dashboard or the update history page for Windows 11, version 25H2 and 24H2.

Improvements and fixes

This security update includes quality improvements.

The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change.

[Networking] Fixed: This update addresses a security issue in the Windows Routing and Remote Access Service (RRAS) management tool. If you connect to a malicious remote server, an attacker could disrupt the tool or run code on your device. For more information about these security fixes, see CVE-2026-25172, CVE-2026-25173, and CVE-2026-26111.

Note: This hotpatch update is offered only to hotpatch‑enabled devices. No action is required for devices that receive standard Windows updates. This hotpatch update will install and take effect without requiring you to restart the device. For more information see Hotpatch updates.

If you've already installed previous updates, your device will download and install only the new updates included in this package.

Known issues in this update

Symptom

After installing this update, you might experience an issue signing into apps with a Microsoft account. Even when the device has a working internet connection, an error might appear during sign in that indicates a lack of internet connection and prevents access to Microsoft services and apps such as Microsoft Teams Free and OneDrive.

Note: Only sign ins using Microsoft accounts are affected. Businesses using Microsoft Entra ID for app authentication will not experience this issue.

Other applications affected include, but are not limited to, Microsoft Edge, Excel, Word, and Microsoft 365 Copilot. Whenever a feature in these applications requires signing into a Microsoft account, a similar error message can be encountered.

Workaround

This issue occurs when the device enters a specific network connectivity state and might resolve on its own. If you encounter this issue, restart the device while keeping it connected to the internet. This should repair the device connectivity state and prevent the issue from occurring.

Warning: If the device is restarted without an active internet connection, it might return to a connectivity state where the issue can occur again.

Microsoft is working to release a resolution for this issue in the next few days. Additional information will be shared as soon as it becomes available.

How to get this update

Before you install this update

Microsoft combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. For general information about SSUs, see Servicing stack updates.

If you are using Windows Update, the latest SSU installs with this update.

Install this update

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

Release Channels	Available	Next step
Windows Update		This update downloads and installs automatically from Windows update.
Catalog		See the other options.
Server Update Services		See the other options.