September 9, 2025—Hotpatch KB5065306 (OS Build 20348.4106)
Berlaku Untuk
Tanggal Rilis:
09/09/2025
Versi:
OS Build 20348.4106
Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.
To learn more about Windows update terminology, see types of Windows updates and monthly quality update types. For an overview, see the update history page for Windows Server 2022.
Stay informed! Follow @WindowsUpdate for the latest updates from the Windows Release Health Dashboard.
Improvements and fixes
This security update includes quality improvements. The following summary outlines key issues addressed by this update.
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[App compatibility (known issue)] Addresses an issue that caused non-admin users to receive unexpected User Account Control (UAC) prompts when MSI installers perform certain custom actions. These actions might include configuration or repair operations in the foreground or background, during the initial installation of an application.
This issue could prevent non-admin users from running apps that perform MSI repairs, including Office Professional Plus 2010 and multiple applications from Autodesk (including AutoCAD). This fix reduces the scope for requiring UAC prompts for MSI repairs and enables IT admins to disable UAC prompts for specific apps by adding them to an allowlist.
For more information, see Unexpected UAC prompts when running MSI repair operations after installing the August 2025 Windows security update.
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
Symptoms We are aware of an edge case affecting hotpatched devices that have installed the September 2025 Hotpatch update (KB5065306) or the September 2025 security update (KB5065432). These devices may experience failures with PowerShell Direct (PSDirect) connections when the host and guest virtual machines (VMs) are both not fully updated. When a patched guest VM attempts to connect to an unpatched host (or vice versa), the system is expected to fall back to a legacy handshake and clean up the socket gracefully. However, this fallback mechanism fails intermittently, resulting in socket cleanup issues. The connection failure might appear random, and users might observe Event ID 4625 logged in the Security Event log within Windows Event Viewer.
Workaround
This issue is addressed in KB5066359. If your hotpatched device is experiencing issues with PSDirect connection, we recommend updating both the host and guest VM with these updates.
How to get this update
Before you install this update
Microsoft now combines the latest servicing stack update (SSU) for your operating system with the hotpatch update. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.
If you are using Windows Update or Windows Server Update Services (WSUS), the latest SSU installs with this update.
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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See the other options. |
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This update automatically syncs with Windows Server Update Services (WSUS) if you configure Products and Classifications as follows: Product: Server 2022 Hotpatch Category Classification: Security Updates |
File information
For a list of the files provided in this update, download the file information for cumulative update 5065306.
For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5065769) - version 20348.4160.
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