June 9, 2026—Baseline
Applies To
Baseline Month
Note:Â The June 2026 Windows security update is delivered as a baseline update instead of a hotpatch update to help protect devices as quickly as possible after the public disclosure of a security vulnerability outside the typical coordinated disclosure best practices (CVE-2026-45585). Devices require a restart to complete installation.
The June 2026 security baseline will be available starting June 9, 2026. For more information, see KB5094125.
To learn more about release cadence, see Release notes for Hotpatch on Windows Server 2025 Datacenter Azure Edition.
Note: Windows Server 2025 Datacenter & Standard machines that are connected to Azure Arc, now have the option to subscribe to hotpatch servicing. Hotpatch provides the ability to install OS security updates without restarting your machine. To learn more, see Hotpatch for Windows Server.
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