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Windows Server 2022 Windows Server 2022 Out-of-band update
Out-of-band

KB5077800

KB5077800: Cumulative update for Windows Server, version 2022, January 2026. Remote Desktop sign-ins work again after the January update

In short

A sign-in failure affecting some Remote Desktop apps after the January 13 security update is fixed. The package also includes servicing stack improvements.

Does it affect you? Applies to: Devices running Windows Server 2022, x64.

Build
20348.4650
Restart
Required

What changes

Fix 1 change

Remote Desktop

For: Remote Desktop users

  • Some people who had sign-in failures with Remote Desktop apps can connect again.1
    Fixes authentication failures in Remote Desktop connections after KB5073457, including connections through Windows App.

Improvement 1 change

Servicing stack

  • The component that installs Windows updates gets quality improvements.2
    Includes servicing stack update KB5074428, build 20348.4640.

Known issues

  1. Open Affects: Organizations and IT administrators

    Windows Server Update Services (WSUS) does not display error details

    After KB5070884 or later, WSUS does not show synchronization error details. Microsoft says this reporting feature is temporarily removed to address a remote code execution vulnerability.3

    Workaround status No workaround yet

    Microsoft has not published a manual workaround for this issue yet. Monitor release health until a resolving update is available.

  2. Open Affects: Organizations and IT administrators

    Some devices with Virtual Secure Mode enabled might fail to shut down or hibernate

    Some Secure Launch-capable PCs with Virtual Secure Mode enabled might restart instead of shutting down or entering hibernation.4

    How to apply the workaround Workaround

    Install KB5075906, which addresses this issue.4

  3. Open Affects: Organizations and IT administrators

    Apps might become unresponsive when saving files to cloud-based storage

    Some apps might stop responding or show errors when opening or saving files in cloud storage such as OneDrive or Dropbox. Outlook might hang when a PST file is stored on OneDrive.5

    How to apply the workaround Workaround

    Install KB5078136, which addresses this issue.5

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released
2026-01-17
Classification
Updates
Type
Cumulative update
Restart
Required
Replaces
KB5073457, KB5071547, KB5068787, KB5070884
+29 earlier KB5066782, KB5065432, KB5063880, KB5062572, KB5060526, KB5061906, KB5058385, KB5059092, KB5058920, KB5055526, KB5053603, KB5051979, KB5052819, KB5049983, KB5048654, KB5046616, KB5047767, KB5044281, KB5042881, KB5041160, KB5040437, KB5041054, KB5039227, KB5037782, KB5036909, KB5037422, KB5035857, KB5034770, KB5034129
Replaced by
KB5078136
VersionBuildChannel
2022 20348.4650 General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 2022
415.0 MB
windows10.0-kb5077800-x64.msu Main update · KB5077800 SHA-1: 29640ba8…a0fda7

Updated components

93 files changed since the previous update for the same versions.

Top changed componentsFiles
Secure Boot5
Kernel3
Audio2
Hyper-V and virtualization2

Sources

Updated
Cited passages from Microsoft's official notes (5)
  1. 1. Fixed: After installing the January 2026 Windows security update (KB5073457), some users experienced sign-in failures during Remote Desktop connections. support.microsoft.com
  2. 2. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
  3. 3. After installing KB5070884 or later updates, Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting. support.microsoft.com
  4. 4. This issue is addressed in KB5075906. support.microsoft.com
  5. 5. This issue is addressed in KB5078136. support.microsoft.com
Checked automatically: 8 of 8 checks passed, 5 quoted passages · compared with Microsoft's page on Sep 25, 2026
  • Quotes found in the official pages: passed
  • Numbers found in the sources: passed
  • Vulnerabilities from the dossier only: passed
  • Links to allowed domains only: passed
  • Every official change covered: passed
  • Readable plain text: passed
  • Changes confirmed by the file list: passed
  • Sources agree: passed

A second AI read the text against the sources: correctness 4/5, clarity 4/5, completeness 4/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake