Microsoft Windows Server 2022 Update Version OS Build 20348.5139

KB5087545 updates Windows Server 2022 to OS Build 20348.5139 with security fixes, quality improvements, and Secure Boot rollout changes. It also includes a servicing stack update, addresses Remote Desktop dialog rendering, and notes BitLocker and WSUS-related issues.

• Adds additional high-confidence device targeting data to help eligible devices receive new Secure Boot certificates in a controlled rollout.
• Introduces a new C:\Windows\SecureBoot folder on eligible devices with scripts for detecting Secure Boot certificate update status and automating deployment in Active Directory environments.
• Addresses the Remote Desktop Connection security warning dialog rendering issue in multi-monitor scenarios with different scaling.
• WSUS synchronization error details are temporarily removed to address the Remote Code Execution vulnerability CVE-2025-59287.

• Improves calculation accuracy and reliability for apps and system components, especially with very small values.
• Improves Windows Server interface responsiveness and reduces instances where windows stop responding.
• Fixes the Remote Desktop Connection security warning dialog rendering incorrectly in multi-monitor scenarios with different scaling.

• Adds a new C:\Windows\SecureBoot folder on eligible devices containing example scripts for Secure Boot certificate update management.
• Supports the 2023 daylight saving time change for the Arab Republic of Egypt.

• Some devices with an unrecommended BitLocker Group Policy configuration may be prompted for the BitLocker recovery key on the first restart after installing the update.
• After installing KB5070884 or later updates, WSUS does not display synchronization error details in its error reporting.

• Release date: 2026-05-12.
• Includes fixes and quality improvements from KB5082142 and KB5091575.
• If affected by the BitLocker issue, Microsoft recommends setting the BitLocker TPM platform validation profile policy to Not Configured, running gpupdate /force, then suspending and resuming BitLocker.
• The servicing stack update is KB5089140 (OS Build 20348.5120).
• The Secure Boot guidance references a phased rollout and sample automation for organizations managing device fleets.

Product Information

Vendor: Microsoft

Product: Windows Server 2022

Product type: Software

Application category: Utilities

Platform: Windows

Version: OS Build 20348.5139

Vendor release date: May 12, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jun 3, 2026

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