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

Version: OS Build 20348.4893

Release date: Mar 10, 2026

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