[BESAdmin-Announcements] Content Release: September 2026 Security Updates published 2026-09-08 (1)

Tue Sep 8 17:24:41 PDT 2026

Content in the Patches for Windows site has been released.

New:

* Major [ID:512276801] MS26-SEP: Security Update for SQL Server 2022 RTM CU
- SQL Server 2022 - KB5122768 (x64)
* Major [ID:50725369] MS26-SEP: Security Update for Microsoft Visual Studio
2026 version 18.9.3 - KB5072533
* Major [ID:512614405] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8 for Windows 10 Version 1809 - Windows 10 Version 1809 - .NET
Framework 3.5/4.8 - KB5126048 (x64)
* Major [ID:512605203] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 24H2 - Windows 11 Version 24H2 - .NET
Framework 3.5/4.8.1 - KB5126052 (x64)
* Major [ID:512614901] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Microsoft server operating system version 21H2 - Windows
Server 2022 - .NET Framework 3.5/4.8.1 - KB5126422 (x64)
* Major [ID:512288201] MS26-SEP: Cumulative Update for Microsoft server
operating system version 21H2 - Windows Server 2022 - KB5122882 (x64)
* Major [ID:512287803] MS26-SEP: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5122878 (x64)
* Major [ID:512287801] MS26-SEP: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5122878
* Major [ID:512287605] MS26-SEP: Cumulative Update for Windows Server 2019
- Windows Server 2019 - KB5122876 (x64)
* Major [ID:512287603] MS26-SEP: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5122876 (x64)
* Major [ID:512287601] MS26-SEP: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5122876
* Major [ID:512309905] MS26-SEP: Cumulative Update for Windows Server 2016
- Windows Server 2016 - KB5123099 (x64)
* Major [ID:512309903] MS26-SEP: Cumulative Update for Windows 10 Version
1607 - Windows 10 Version 1607 LTSB - KB5123099 (x64)
* Major [ID:512309901] MS26-SEP: Cumulative Update for Windows 10 Version
1607 - Windows 10 Version 1607 LTSB - KB5123099
* Major [ID:512400801] MS26-SEP: Cumulative Update for Windows 11, version
24H2 - Windows 11 Version 24H2 - KB5124008 (x64)
* Major [ID:512400807] MS26-SEP: Cumulative Update for Windows 11, version
25H2 for ARM64 - Windows 11 Version 25H2 - KB5124008 (arm64)
* Major [ID:512400805] MS26-SEP: Cumulative Update for Windows 11, version
25H2 - Windows 11 Version 25H2 - KB5124008 (x64)
* Major [ID:512400803] MS26-SEP: Cumulative Update for Windows 11, version
24H2 for ARM64 - Windows 11 Version 24H2 - KB5124008 (arm64)
* Major [ID:512288003] MS26-SEP: Cumulative Update for Windows 11, version
23H2 for ARM64 - Windows 11 Version 23H2 - KB5122880 (arm64)
* Major [ID:512288001] MS26-SEP: Cumulative Update for Windows 11, version
23H2 - Windows 11 Version 23H2 - KB5122880 (x64)
* Major [ID:512287405] MS26-SEP: Servicing Stack Update for Windows Server
2016 - Windows Server 2016 - KB5122874 (x64)
* Major [ID:512287403] MS26-SEP: Servicing Stack Update for Windows 10
Version 1607 - Windows 10 Version 1607 - KB5122874 (x64)
* Major [ID:512287401] MS26-SEP: Servicing Stack Update for Windows 10
Version 1607 - Windows 10 Version 1607 - KB5122874
* Major [ID:512277301] MS26-SEP: Security Update for SQL Server 2019 RTM
GDR - SQL Server 2019 - KB5122773 (x64)
* Major [ID:512277201] MS26-SEP: Security Update for SQL Server 2019 RTM CU
- SQL Server 2019 - KB5122772 (x64)
* Major [ID:512277501] MS26-SEP: Security Update for SQL Server 2017 RTM
GDR - SQL Server 2017 - KB5122775 (x64)
* Major [ID:512277401] MS26-SEP: Security Update for SQL Server 2017 RTM CU
- SQL Server 2017 - KB5122774 (x64)
* Major [ID:512277001] MS26-SEP: Security Update for SQL Server 2025 RTM
GDR - SQL Server 2025 - KB5122770 (x64)
* Major [ID:500736175] MS26-SEP: Security Update for Microsoft Visual
Studio 2022 version 17.14.40 - KB5007364
* Major [ID:512160801] MS26-SEP: Security Update For Exchange Server
Subscription Edition - Exchange Server 2025 - KB5121608 (x64)
* Major [ID:512604703] MS26-SEP: Cumulative Update for .NET Framework 4.8
for Windows Server 2016 - Windows Server 2016 - .NET Framework 4.8 -
KB5126047 (x64)
* Major [ID:512604701] MS26-SEP: Cumulative Update for .NET Framework 4.8
for Windows 10 Version 1607 - Windows 10 Version 1607 - .NET Framework 4.8
- KB5126047
* Major [ID:512614407] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8 for Windows Server 2019 - Windows Server 2019 - .NET Framework
3.5/4.8 - KB5126048 (x64)
* Major [ID:512614507] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8 for Windows 10 Version 21H2 - Windows 10 Version 21H2 - .NET
Framework 3.5/4.8 - KB5126046 (x64)
* Major [ID:512614505] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8 for Windows 10 Version 21H2 - Windows 10 Version 21H2 - .NET
Framework 3.5/4.8 - KB5126046
* Major [ID:512614903] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8 for Microsoft server operating system version 21H2 - Windows Server
2022 - .NET Framework 3.5/4.8 - KB5126050 (x64)
* Major [ID:512605205] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 25H2 for ARM64 - Windows 11 Version 25H2
- .NET Framework 3.5/4.8.1 - KB5126052 (arm64)
* Major [ID:512642401] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 23H2 for ARM64 - Windows 11 Version 23H2
- .NET Framework 3.5/4.8.1 - KB5126424 (arm64)
* Major [ID:512614503] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 10 Version 21H2 - Windows 10 Version 21H2 - .NET
Framework 3.5/4.8.1 - KB5126421 (x64)
* Major [ID:512614501] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 10 Version 21H2 - Windows 10 Version 21H2 - .NET
Framework 3.5/4.8.1 - KB5126421
* Major [ID:512605201] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Microsoft server operating system version 24H2 - Windows
Server 2025 - .NET Framework 3.5/4.8.1 - KB5126052 (x64)
* Major [ID:512614403] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.7.2 for Windows 10 Version 1809 - Windows 10 Version 1809 - .NET
Framework 3.5/4.7.2 - KB5126043 (x64)
* Major [ID:512614401] MS26-SEP: Cumulative Update for .NET Framework 3.5
and 4.7.2 for Windows 10 Version 1809 - Windows 10 Version 1809 - .NET
Framework 3.5/4.7.2 - KB5126043
* Major [ID:45763485] MS26-SEP: Security Update for Microsoft Visual Studio
2017 version 15.9.83 - KB4576341
* Major [ID:45763399] MS26-SEP: Security Update for Microsoft Visual Studio
2019 version 16.11.60 - KB4576339

Reason for Update:

* Microsoft released September security updates.

Additional Notes:

Due to formatting changes on Microsoft's support pages, our latest release
was briefly delayed. The next content drop will include full coverage for
the delayed .NET, Office, SharePoint, and SQL components, as well as
supersedence.

Actions to Take:
None

Published site version:
Patches for Windows, Version: 4776

Additional links:

Application Engineering Team
HCL BigFix
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