KB5129237: Cumulative update for Windows Server, version 2022, September 2026. Remote Desktop failures and multichannel USB audio fixed

Remote Desktop connection and sign-in failures are fixed, along with 8-channel and 3D audio problems on some USB Audio Class 1.0 devices. The update is available only through the Microsoft Update Catalog.

Does it affect you? Applies to: Devices running Windows Server 2022. The USB audio issue is limited to USB Audio Class 1.0 devices; the Remote Desktop issue affects environments using Remote Desktop Services.

What changes

Fixes 2 changes

Remote Desktop Services

Verified in package

For: Environments using Remote Desktop Services

Remote Desktop connections and sign-ins work again in affected environments, where the service could become unstable and leave servers or related tools unresponsive.¹
Addresses the issue after installing KB5122882; affected tools include MMC, RDS Licensing Diagnoser, File Explorer, and the Windows Update page.

8-channel or 3D audio modes

Verified in package

For: Devices with USB Audio Class 1.0 audio devices

Some USB Audio Class 1.0 devices can use 8-channel or 3D audio modes without the failures addressed by this update.²
Other USB Audio Class 1.0 symptoms, including some Code 10 errors or no audio output, are resolved in KB5126655.

Improvement 1 change

Servicing stack

For: Windows Server 2022 devices

The component that installs Windows updates receives quality improvements.³
Includes servicing stack update KB5122881, build 20348.5614.

Known issues

Open Affects: Organizations and IT administrators

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

After installing KB5070884 or later updates, WSUS does not show synchronization error details. This functionality is temporarily removed to address CVE-2025-59287.⁴

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.
Resolved Affects: Everyone Resolved by KB5129237

USB Audio Class 1.0 devices with error Code 10 or no output

Some USB Audio Class 1.0 devices experienced audio failures after KB5122882. KB5129237 resolves the 8-channel and 3D audio symptoms; the remaining symptoms are resolved by KB5126655.⁵

How to apply the workaround Workaround

Some customers report restoring audio in multichannel cases by switching to 2-channel mode.⁵

Technical details

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

Data sheet

Released: 2026-09-14
Classification: Updates
Type: Cumulative update
Restart: Required
Replaces: KB5122882, KB5120242, KB5099540, KB5094128

+41 earlier
KB5087545, KB5091575, KB5082142, KB5078766, KB5082314, KB5075906, KB5078136, KB5077800, KB5073457, KB5071547, KB5068787, KB5070884, 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: KB5126655

Version	Build	Channel
2022	20348.5631	General availability

Security

No vulnerabilities are listed for this update.

Downloads (Microsoft Update Catalog)

x64 2022

560.0 MB

windows10.0-kb5129237-x64.msu Main update · KB5129237 SHA-1: e93c6b85…619096

Updated components

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

Top changed components	Files
Audio	1
Remote Desktop	1

Verified in package: changed files confirm Remote Desktop Services, 8-channel or 3D audio modes.

Sources

Updated Oct 26, 2026

Cited passages from Microsoft's official notes (5)

1. [Remote Desktop Services (known issue)] Fixed: This update addresses an issue affecting Remote Desktop Services (RDS) after installing the September 2026 Windows security update support.microsoft.com
2. [8-channel or 3D audio modes] Fixed: Some USB Audio Class 1.0 devices functioning as expected in standard stereo configurations failed when using multichannel audio features, including 8-channel or 3D audio modes. support.microsoft.com
3. This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. support.microsoft.com
4. After installing KB5070884 or later updates, Windows Server Update Services (WSUS) does not display synchronization error details within its error reporting. This functionality is temporarily removed to address the Remote Code Execution Vulnerability, CVE-2025-59287. support.microsoft.com
5. The symptoms experienced on devices using 8-channel or 3D audio modes (last bullet point in the list of symptoms documented in this entry) are resolved in the out-of-band (OOB) update released on September 14, 2026, (KB5129237), and updates released after this date. The remaining symptoms are resolved in the Windows security update released on October 13, 2026 (KB5126655) learn.microsoft.com

Checked automatically: 8 of 8 checks passed, 5 quoted passages · compared with Microsoft's page on Nov 13, 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 5/5, clarity 4/5, completeness 5/5. 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