KB5136487OOBOut-of-band release · 2026-11 OOB

Out-of-band release for Windows Server 2022

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Microsoft lists an unresolved issue affecting these Windows versions. Test on devices that match the affected configurations before deploying widely.

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Urgency Elevated · 30 critical Risk High · 1 open issue

1Windows version

1Open known issues affecting it

MSRC lists no CVEs under this KB itself; it includes the security fixes of KB5131090 (592 CVEs).

From Microsoft's release-information tables

Servicing branch	OS build	Release	Available
Windows Server 2022	20348.5873	OOB 2026-11 OOB	13 Nov 2026

Includes unresolved issues from earlier releases

Confirmedfrom KB5126655Server 2022updated 11 Nov

SQL Server linked server connections might remain open Connections to external databases such as Oracle and PostgreSQL can accumulate over time

Windows release health names no issues fixed by this KB in the collected data.

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