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Microsoft Windows Server out-of-band updates (April 2026)

Security Patch Release
First reported
Last updated
Happening score
H score 32
1 unique sources, 2 articles

Summary

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Microsoft released out-of-band (OOB) updates for Windows Server after the April 2026 security updates triggered KB5082063 installation failures and domain controller restart loops, creating availability risk for server infrastructure. The emergency fixes cover Windows Server 2025, 23H2, 2022, 2019, and 2016, with Azure Edition hotpatch releases also issued for supported cloud builds. KB5091157 for Windows Server 2025 addresses both defects, while the other supported releases focus on the LSASS crash-driven restart issue.

Related Happenings

Microsoft extends Windows Server 2022 Hotpatch support through October 2027 for enrolled Azure Edition servers

Security Tool/Service
H score11 First: 29.06.2026 20:11 Last: 29.06.2026 20:11 Sources 1

About this happening: Microsoft has extended **Windows Server 2022 Hotpatch** support through **October 2027**, preserving **monthly security updates without restarts** for enrolled servers and reducin...

Open Happening

Microsoft Windows Server 2016 KB5094122 installation failures resolved

Service Disruption
H score1 First: 18.06.2026 13:14 Last: 18.06.2026 13:14 Sources 1

About this happening: Microsoft resolved a **Windows Server 2016** update-installation failure that blocked **June 2026 security updates** on some unpatched servers. Affected devices could hit **0x8007...

Open Happening

Microsoft WUSA network-share Windows update failure

Service Disruption
H score0 First: 12.06.2026 14:44 Last: 12.06.2026 14:44 Sources 1

About this happening: Microsoft has fixed a **WUSA** problem that caused **Windows updates** to fail when installed from a **network share**, disrupting update deployment on **Windows 11 24H2/25H2** an...

Open Happening

Microsoft Windows Server 2025 and Windows 11 23H2 BitLocker recovery fix

Security Patch Release
H score15 First: 11.06.2026 11:44 Last: 11.06.2026 11:44 Sources 1

About this happening: Microsoft shipped **KB5094125** for **Windows Server 2025** and **KB5093998** for **Windows 11 23H2** to fix a **BitLocker recovery** bug tied to the **April 2026 security update*...

Open Happening

Microsoft Windows Update installation failures on upgraded Windows 11 PCs

Service Disruption
H score1 First: 10.06.2026 14:33 Last: 10.06.2026 14:33 Sources 1

About this happening: **Microsoft Windows Update** is failing on a **small percentage of upgraded Windows 11 PCs**, blocking **June 2026 cumulative updates** and producing **0x80073712** or **0x800f099...

Open Happening

Timeline

  1. 20.04.2026 11:30 3 articles · 2mo ago

    Microsoft discloses Windows Server OOB fixes for KB5082063 and LSASS issues

    Initial Disclosure

    Microsoft said it released out-of-band updates for affected Windows Server releases after the April 2026 security updates caused KB5082063 installation failures on Windows Server 2025 and restart loops on domain controller systems when LSASS crashed; Microsoft also warned that some Windows Server 2025 devices can boot into BitLocker recovery after KB5082063.

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