Microsoft Windows Server 2022 Update Version OS Build 20348.4650

KB5077800 for Windows Server 2022 (OS Build 20348.4650) is an out-of-band cumulative update. It includes January 13, 2026 security fixes (KB5073457) plus a Remote Desktop sign-in fix and servicing stack update KB5074428.

• Includes security fixes from the January 13, 2026 security update (KB5073457).
• WSUS error details are temporarily removed to address the Remote Code Execution vulnerability CVE-2025-59287.

• Fixed Remote Desktop sign-in failures that occurred after installing the January 2026 Windows security update (KB5073457).

• WSUS does not display synchronization error details after installing KB5070884 or later updates.
• Some applications may become unresponsive or show errors when opening or saving files to cloud-based storage such as OneDrive or Dropbox.
• Outlook may hang when PST files are stored on OneDrive, and sent items or downloaded emails may appear missing or re-download.
• Some Secure Launch-capable PCs with Virtual Secure Mode enabled may restart instead of shutting down or hibernating.

• This update is cumulative; devices with earlier updates installed will download only the new content in this package.
• The cloud-storage issue is addressed in KB5078136.
• The VSM shutdown/hibernate issue is addressed in KB5075906.
• Includes servicing stack update KB5074428 (OS Build 20348.4640).

Product Information

Vendor: Microsoft

Product: Windows Server 2022

Product type: Other

Application category: Utilities

Platform: Windows

Version: OS Build 20348.4650

Vendor release date: Jan 17, 2026

Published on updatealert.io: Jun 3, 2026

Description: Server operating system for on-premises and hybrid workloads.