June 9, 2026—KB5094122 (OS Build 14393.9234)
Applies To
Windows Server 2016, all editionsWin 10 Ent LTSB 2016Win 10 IoT Ent LTSB 2016
Release Date:
6/9/2026
Version:
OS Build 14393.9234
This article lists the security issues and quality improvements included in this cumulative security update.
Windows Server 2016Windows 10, version 1607
Applies to: Windows Server 2016
This security update includes fixes and improvements that are a part of the following update:
The following is a summary of the issues that this update addresses. The bold text within the brackets indicates the item or area of the change we are documenting.
[Secure Boot]
This update adds a new policy setting, LimitSecureBootRequiredServiceData, under Computer Configuration > Administrative Templates > Windows Components > Secure Boot. When this setting is enabled, Windows limits the Secure Boot service data it sends by suppressing the event normally sent to Microsoft. This policy is also included in the Windows Restricted Traffic Limited Functionality Baseline package. For information about the policy, see Manage connections from Windows 10 and Windows 11 operating system components to Microsoft services.
With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout.
[Domain controller (known issue)] Fixed: Addressed an issue that affects DFS (Distributed File System) Namespaces on servers with...
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