Microsoft SQL Server SQL Server 2022 Update Version 16.0.4240.4
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Update Summary
KB5077464 updates SQL Server 2022 CU23 to build 16.0.4240.4 and fixes two elevation-of-privilege vulnerabilities: CVE-2026-21262 and CVE-2026-26115. It also includes security fixes for merge replication upgrade and ALTER USER handling.
Update Details
Security
- Fixes CVE-2026-21262 and CVE-2026-26115, both SQL Server elevation-of-privilege vulnerabilities.
- Fixes an elevation-of-privilege vulnerability in the version upgrade process for merge replication.
- Blocks
ALTER USERwhen the target login is the system Administrator account.
Bug Fixes
- Fixes the version upgrade process for merge replication.
- Blocks
ALTER USERfor the system Administrator account target login.
Hints
- Prerequisite: SQL Server 2022 or any SQL Server 2022 CU release through CU23 GDR must already be installed.
- If you install a language pack after installing this update, you must reinstall the update.
- For Linux, the Cumulative Update repository must be configured before updating to the latest CU.
- Installing this security update is optional for computers that do not host Microsoft SQL Server Reporting Services.
Links
-
Microsoft Download Center package
https://www.microsoft.com/en-us/download/details.aspx?id=0
Product Information
Vendor: Microsoft
Product: SQL Server
Product type: Software
Variant: SQL Server 2022
Version: 16.0.4240.4
Vendor information published: Mar 10, 2026
Original release notes: View on vendor site
Published on updatealert.io: Aug 16, 2026