Microsoft Windows Server 2022 Update Version OS Build 20348.4651
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Update Summary
KB5078136 for Windows Server 2022 (OS Build 20348.4651) is an out-of-band cumulative update that includes prior security fixes plus a file system fix for cloud-based storage issues. It also includes servicing stack update KB5074428 and notes known issues affecting WSUS error details and VSM shutdown or hibernation.
Update Details
Security
- Includes security fixes and improvements from the January 13, 2026 security update (KB5073457) and the January 17, 2026 out-of-band update (KB5077800).
- WSUS synchronization error details are temporarily removed to address CVE-2025-59287.
Bug Fixes
- Fixed an issue where some applications became unresponsive or errored when opening or saving files to cloud-based storage such as OneDrive or Dropbox.
- Fixed an Outlook issue where PST files stored on OneDrive could cause Outlook to hang, fail to reopen, or show missing sent items and re-downloaded emails.
Known Issues
- WSUS does not display synchronization error details in error reporting after installing KB5070884 or later updates.
- Some Secure Launch-capable PCs with Virtual Secure Mode enabled may fail to shut down or hibernate and instead restart.
Hints
- This update is cumulative; devices with earlier updates installed will download and install only the new content in this package.
- Includes servicing stack update KB5074428 (OS Build 20348.4640).
- The VSM shutdown/hibernate issue is addressed in KB5075906.
Product Information
Vendor: Microsoft
Product: Windows Server 2022
Product type: Software
Application category: Utilities
Platform: Windows
Version: OS Build 20348.4651
Vendor information published: Jan 24, 2026
Original release notes: View on vendor site
Published on updatealert.io: Jun 3, 2026
Description: Server operating system for on-premises and hybrid workloads.