September 12, 2023—KB5030213 (OS Build 14393.6252)

Highlights

• This update addresses security issues for your Windows operating system. 

Improvements

This security update includes quality improvements. When you install this KB: 

• This update supports daylight saving time (DST) changes in Israel.

• This update addresses an issue that affects remote procedure calls (RPC) to the Win32_User or Win32_Group WMI class. The domain member that runs the RPC contacts the primary domain controller (PDC). When multiple RPCs occur at the same time on many domain members, this might overwhelm the PDC.

• This update addresses an issue that affects the LanmanServer Service. It stops working in clusters that do not have an Administrative Access Point. These are also known as AD-Detached Clusters. They are recommended for Microsoft Exchange on some versions of Windows. To learn more, see Database availability groups.

• This update addresses an issue that affects authentication. Using a smart card to join or rejoin a computer to an Active Directory domain might fail. This occurs after you install Windows updates dated October 2022 or later. For more details, see KB5020276.

If you installed earlier updates, only the new updates contained in this package will be downloaded and installed on your device.  

For more information about security vulnerabilities, please refer to the new Security Update Guide website and the September 2023 Security Updates.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

Before installing this update

Microsoft strongly recommends you install the latest servicing stack update (SSU) for your operating system before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security updates. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions. 

If you are using Windows Update, the latest SSU (KB5030504) will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. 

Install this update

File information

For a list of the files that are provided in this update, download the file information for cumulative update 5030213.