Microsoft Windows Server 2022 Update Version OS Build 20348.4893
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Update Summary
KB5078766 for Windows Server 2022 updates OS Build 20348.4893 with the latest security fixes and quality improvements from KB5075906 and KB5082314. It also adds Secure Boot certificate targeting data and a warning dialog in Windows System Image Manager.
Update Details
Security
- Includes the latest security fixes for Windows Server 2022.
- Adds additional high-confidence device targeting data for phased delivery of new Secure Boot certificates.
- Windows quality updates now help control Secure Boot certificate rollout based on successful update signals.
Bug Fixes
- Improves the reliability of choosing trusted catalog files in Windows System Image Manager.
- Adds a warning dialog to help confirm that selected catalog files come from a trusted source.
New Features
- Windows quality updates now include additional device targeting data for Secure Boot certificate rollout.
Hints
- If previous updates are already installed, only the new updates in this package will be downloaded and installed.
- Secure Boot certificates used by most Windows devices are set to expire starting in June 2026; review the guidance and update certificates in advance.
- Servers are unlikely to qualify for automatic Secure Boot certificate targeting due to limited diagnostic data.
Product Information
Vendor: Microsoft
Product: Windows Server 2022
Product type: Software
Application category: Utilities
Platform: Windows
Version: OS Build 20348.4893
Vendor release date: Mar 10, 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.