Microsoft Windows Server 2022 Update Version OS Build 20348.5622

KB5122882 for Windows Server 2022 (OS Build 20348.5622) includes the latest security fixes plus non-security improvements from KB5120242. It also updates the servicing stack with KB5122881. Reference IDs: KB5070884, CVE-2025-59287.

• Includes the latest security fixes for Windows Server 2022.
• Addresses WSUS behavior related to the Remote Code Execution vulnerability CVE-2025-59287 by temporarily removing synchronization error details.

• Improves application compatibility during Windows certificate-authority updates.
• Adjusts Morocco Standard Time for the transition to permanent UTC+00:00 on Sep 20, 2026.
• Fixes an issue that could cause some Windows Server 2022 Hyper-V virtual machines to intermittently stop with error 0x139 and restart unexpectedly.
• Improves network failover so connections respond faster when a network adapter is disconnected.
• Improves Remote Desktop audio redirection so audio from remote sessions plays correctly on the local device.

• WSUS does not display synchronization error details after installing KB5070884 or later updates.

• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• Includes servicing stack update KB5122881 (OS Build 20348.5614).
• Secure Boot certificates used by most Windows devices are set to expire starting in June 2026; updated certificates will continue to be delivered through Windows Update.

Product Information

Vendor: Microsoft

Product: Windows Server 2022

Product type: Software

Application category: Utilities

Platform: Windows

Version: OS Build 20348.5622

Vendor information published: Sep 8, 2026

Original release notes: View on vendor site

Published on updatealert.io: Sep 9, 2026

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