The Security Update for SQL Server 2025 RTM CU4 is now available for download at the Microsoft Download Center and Microsoft Update Catalog sites. This package cumulatively includes all previous security fixes for SQL Server 2025 RTM CUs, plus it includes the new security fixes detailed in the KB Article. Security Bulletins: CVE-2026-40370 - Security Update Guide - Microsoft - Microsoft SQL Server Denial of Service Vulnerability Security Update of SQL Server 2025 RTM CU4 KB Article: KB5089899 Microsoft Download Center: https://www.microsoft.com/download/details.aspx?familyid=a9274560-fbdb-421c-b2cb-123ab69dc098 Microsoft Update Catalog: https://www.catalog.update.microsoft.com/Search.aspx?q=5089899 Latest Updates for Microsoft SQL Server: https://learn.microsoft.com/en-us/troubleshoot/sql/releases/download-and-install-latest-updates