Microsoft Windows Server 2022 Update Version OS Build 20348.4650

Views
2

Your rating
Rate update installation process

Log in to rate this update.
Login

Risk factor
No ratings yet. Be the first to rate this update.

Smooth installs 0%
Minor issues 0%
Major issues 0%

Update Summary

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.

Update Details

Security

  • 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.

Bug Fixes

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

Known Issues

  • 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.

Hints

  • 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

Version: OS Build 20348.4650

Release date: Jan 17, 2026

View All Updates