Microsoft Windows Server 2025 Update Version OS Build 26100.32370

KB5075899 (OS Build 26100.32370) is a cumulative update for Windows Server 2025 with the latest security fixes, quality improvements, and selected non-security updates from prior preview releases. It also includes new DNS Server preview features and a servicing stack update, KB5075898. Reference IDs: CVE-2025-59287.

• Includes the latest security fixes for Windows Server 2025.
• WSUS synchronization error details are temporarily removed to address the Remote Code Execution vulnerability, CVE-2025-59287.

• Fixes File Explorer folder renaming issues when desktop.ini custom names were ignored.
• Fixes a graphics issue where some GPU configurations could trigger dxgmms2.sys and KERNEL_SECURITY_CHECK_FAILURE.
• Disables the forwarded I/O feature in the NVMe stack by default.

• DNS over HTTPS (DoH) support for Windows DNS Server is available in public preview.
• Windows Server now supports random shuffling of DNS resource records in server responses.

• WSUS does not display synchronization error details within error reporting after installing KB5070881 or later updates.

• To enable DNS record shuffling, create RandomShuffle as a DWORD under Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters and set it to 1.
• Set RandomShuffle to 0 or delete the key to disable the feature.
• The DoH preview is for feedback only and is not supported for production use.
• This update includes KB5075898, the Windows Server 2025 servicing stack update.

Product Information

Vendor: Microsoft

Product: Windows Server 2025

Product type: Software

Application category: Utilities

Platform: Windows

Version: OS Build 26100.32370

Vendor release date: Feb 10, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jun 3, 2026

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