[BESAdmin-Announcements] Content Release: October 2026 Security Updates published 2026-10-13

Announcements for BES Administrators besadmin-announcements at bigmail.bigfix.com
Tue Oct 13 16:27:07 PDT 2026 

Content in the Patches for Windows site has been released.

New:

* MAJOR [ID:512892802] MS26-OCT: 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 - KB5127687 (x64)
* MAJOR [ID:512892801] MS26-OCT: 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 - KB5127693 (x64)
* MAJOR [ID:512892404] MS26-OCT: 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 - KB5127689
* MAJOR [ID:512892403] MS26-OCT: 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 - KB5127689 (x64)
* MAJOR [ID:512892402] MS26-OCT: 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 - KB5127683 (x64)
* MAJOR [ID:512892401] MS26-OCT: 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 - KB5127683
* MAJOR [ID:512892306] MS26-OCT: 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 - KB5127685 (x64)
* MAJOR [ID:512892305] MS26-OCT: 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 - KB5127666
* MAJOR [ID:512892304] MS26-OCT: 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 - KB5127685
* MAJOR [ID:512892303] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8 for Windows Server 2019 - Windows Server 2019 - .NET Framework
3.5/4.8 - KB5127685 (x64)
* MAJOR [ID:512892302] MS26-OCT: 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 - KB5127666 (x64)
* MAJOR [ID:512892301] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.7.2 for Windows Server 2019 - Windows Server 2019 - .NET Framework
3.5/4.7.2 - KB5127666 (x64)
* MAJOR [ID:512889501] MS26-OCT: Security Update For Exchange Server
Subscription Edition - Exchange Server 2025 - KB5128895 (x64)
* MAJOR [ID:512849701] MS26-OCT: Security Update for SQL Server 2017 RTM
GDR - SQL Server 2017 - KB5128497 (x64)
* MAJOR [ID:512849601] MS26-OCT: Security Update for SQL Server 2017 RTM CU
- SQL Server 2017 - KB5128496 (x64)
* MAJOR [ID:512849501] MS26-OCT: Security Update for SQL Server 2019 RTM
GDR - SQL Server 2019 - KB5128495 (x64)
* MAJOR [ID:512849401] MS26-OCT: Security Update for SQL Server 2019 RTM CU
- SQL Server 2019 - KB5128494 (x64)
* MAJOR [ID:512849301] MS26-OCT: Security Update for SQL Server 2022 RTM
GDR - SQL Server 2022 - KB5128493 (x64)
* MAJOR [ID:512849201] MS26-OCT: Security Update for SQL Server 2025 RTM
GDR - SQL Server 2025 - KB5128492 (x64)
* MAJOR [ID:512769402] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 26H2 for ARM64 - Windows 11 Version 26H2
- .NET Framework 3.5/4.8.1 - KB5127694 (arm64)
* MAJOR [ID:512769401] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 26H2 - Windows 11 Version 26H2 - .NET
Framework 3.5/4.8.1 - KB5127694 (x64)
* MAJOR [ID:512769202] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 23H2 - Windows 11 Version 23H2 - .NET
Framework 3.5/4.8.1 - KB5127692 (x64)
* MAJOR [ID:512769201] MS26-OCT: 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 - KB5127692 (arm64)
* MAJOR [ID:512769005] MS26-OCT: 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 - KB5127690 (x64)
* MAJOR [ID:512769004] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 24H2 for ARM64 - Windows 11 Version 24H2
- .NET Framework 3.5/4.8.1 - KB5127690 (arm64)
* MAJOR [ID:512769003] MS26-OCT: 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 - KB5127690 (arm64)
* MAJOR [ID:512769002] MS26-OCT: 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 - KB5127690 (x64)
* MAJOR [ID:512769001] MS26-OCT: Cumulative Update for .NET Framework 3.5
and 4.8.1 for Windows 11, version 25H2 - Windows 11 Version 25H2 - .NET
Framework 3.5/4.8.1 - KB5127690 (x64)
* MAJOR [ID:512768403] MS26-OCT: Cumulative Update for .NET Framework 4.8
for Windows 10 Version 1607 - Windows 10 Version 1607 - .NET Framework 4.8
- KB5127684
* MAJOR [ID:512768402] MS26-OCT: Cumulative Update for .NET Framework 4.8
for Windows 10 Version 1607 - Windows 10 Version 1607 - .NET Framework 4.8
- KB5127684 (x64)
* MAJOR [ID:512768401] MS26-OCT: Cumulative Update for .NET Framework 4.8
for Windows Server 2016 - Windows Server 2016 - .NET Framework 4.8 -
KB5127684 (x64)
* MAJOR [ID:512764806] MS26-OCT: Cumulative Update for Windows 11, version
26H2 for ARM64 - Windows 11 Version 26H2 - KB5127648 (arm64)
* MAJOR [ID:512764805] MS26-OCT: Cumulative Update for Windows 11, version
24H2 for ARM64 - Windows 11 Version 24H2 - KB5127648 (arm64)
* MAJOR [ID:512764804] MS26-OCT: Cumulative Update for Windows 11, version
24H2 - Windows 11 Version 24H2 - KB5127648 (x64)
* MAJOR [ID:512764803] MS26-OCT: Cumulative Update for Windows 11, version
25H2 - Windows 11 Version 25H2 - KB5127648 (x64)
* MAJOR [ID:512764802] MS26-OCT: Cumulative Update for Windows 11, version
26H2 - Windows 11 Version 26H2 - KB5127648 (x64)
* MAJOR [ID:512764801] MS26-OCT: Cumulative Update for Windows 11, version
25H2 for ARM64 - Windows 11 Version 25H2 - KB5127648 (arm64)
* MAJOR [ID:512696701] MS26-OCT: Security Update for SQL Server 2025 RTM CU
- SQL Server 2025 - KB5126967 (x64)
* MAJOR [ID:512693401] MS26-OCT: Security Update for SQL Server 2022 RTM CU
- SQL Server 2022 - KB5126934 (x64)
* MAJOR [ID:512686803] MS26-OCT: Cumulative Update for Windows 10 Version
1607 - Windows 10 Version 1607 LTSB - KB5126868 (x64)
* MAJOR [ID:512686802] MS26-OCT: Cumulative Update for Windows Server 2016
- Windows Server 2016 - KB5126868 (x64)
* MAJOR [ID:512686801] MS26-OCT: Cumulative Update for Windows 10 Version
1607 - Windows 10 Version 1607 LTSB - KB5126868
* MAJOR [ID:512665702] MS26-OCT: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5126657 (x64)
* MAJOR [ID:512665701] MS26-OCT: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5126657
* MAJOR [ID:512665501] MS26-OCT: Cumulative Update for Microsoft server
operating system version 21H2 - Windows Server 2022 - KB5126655 (x64)
* MAJOR [ID:512665302] MS26-OCT: Cumulative Update for Windows 11, version
23H2 - Windows 11 Version 23H2 - KB5126653 (x64)
* MAJOR [ID:512665301] MS26-OCT: Cumulative Update for Windows 11, version
23H2 for ARM64 - Windows 11 Version 23H2 - KB5126653 (arm64)
* MAJOR [ID:512665103] MS26-OCT: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5126651 (x64)
* MAJOR [ID:512665102] MS26-OCT: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5126651
* MAJOR [ID:512665101] MS26-OCT: Cumulative Update for Windows Server 2019
- Windows Server 2019 - KB5126651 (x64)
* MAJOR [ID:512664903] MS26-OCT: Servicing Stack Update for Windows Server
2016 - Windows Server 2016 - KB5126649 (x64)
* MAJOR [ID:512664902] MS26-OCT: Servicing Stack Update for Windows 10
Version 1607 - Windows 10 Version 1607 - KB5126649 (x64)
* MAJOR [ID:512664901] MS26-OCT: Servicing Stack Update for Windows 10
Version 1607 - Windows 10 Version 1607 - KB5126649
* MAJOR [ID:512664601] MS26-OCT: Cumulative Update for Microsoft server
operating system version 24H2 - Windows Server 2025 - KB5126646 (x64)
* MAJOR [ID:500736500] MS26-OCT: Security Update for Microsoft Visual
Studio 2022 version 17.14.42 - KB5007364
* MAJOR [ID:500293402] MS26-OCT: Security Update for Microsoft Excel 2016 -
Excel 2016 - KB5002934
* MAJOR [ID:500293401] MS26-OCT: Security Update for Microsoft Excel 2016 -
Excel 2016 - KB5002934 (x64)
* MAJOR [ID:500292801] MS26-OCT: Security Update for Microsoft Office
Online Server - Office Online Server - KB5002928 (x64)
* MAJOR [ID:500292701] MS26-OCT: Security Update for Microsoft SharePoint
Server Subscription Edition - Microsoft SharePoint Server Subscription
Edition - KB5002927 (x64)
* MAJOR [ID:50725374] MS26-OCT: Security Update for Microsoft Visual Studio
2026 version 18.10.4 - KB5072533


Superseded:


* MAJOR [ID:500290801]    MS26-SEP: Security Update for Microsoft
SharePoint Server Subscription Edition - Microsoft SharePoint Server
Subscription Edition - KB5002908 (x64) (Superseded)
* MAJOR [ID:500291001]    MS26-SEP: Security Update for Microsoft Office
Online Server - Office Online Server - KB5002910 (x64) (Superseded)
* MAJOR [ID:512276801]    MS26-SEP: Security Update for SQL Server 2022 RTM
CU - SQL Server 2022 - KB5122768 (x64) (Superseded)
* MAJOR [ID:512276901]    MS26-SEP: Security Update for SQL Server 2025 RTM
CU - SQL Server 2025 - KB5122769 (x64) (Superseded)
* MAJOR [ID:512277001]    MS26-SEP: Security Update for SQL Server 2025 RTM
GDR - SQL Server 2025 - KB5122770 (x64) (Superseded)
* MAJOR [ID:512277101]    MS26-SEP: Security Update for SQL Server 2022 RTM
GDR - SQL Server 2022 - KB5122771 (x64) (Superseded)
* MAJOR [ID:512277201]    MS26-SEP: Security Update for SQL Server 2019 RTM
CU - SQL Server 2019 - KB5122772 (x64) (Superseded)
* MAJOR [ID:512277401]    MS26-SEP: Security Update for SQL Server 2017 RTM
CU - SQL Server 2017 - KB5122774 (x64) (Superseded)
* MAJOR [ID:512277501]    MS26-SEP: Security Update for SQL Server 2017 RTM
GDR - SQL Server 2017 - KB5122775 (x64) (Superseded)
* 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 (Superseded)
* 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) (Superseded)
* MAJOR [ID:512604707]    MS26-SEP: Cumulative Update for .NET Framework
4.8 for Windows 10 Version 1607 - Windows 10 Version 1607 - .NET Framework
4.8 - KB5126047 (x64) (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* MAJOR [ID:512605207]    MS26-SEP: Cumulative Update for .NET Framework
3.5 and 4.8.1 for Windows 11, version 24H2 for ARM64 - Windows 11 Version
24H2 - .NET Framework 3.5/4.8.1 - KB5126052 (arm64) (Superseded)
* MAJOR [ID:512605209]    MS26-SEP: Cumulative Update for .NET Framework
3.5 and 4.8.1 for Windows 11, version 25H2 - Windows 11 Version 25H2 - .NET
Framework 3.5/4.8.1 - KB5126052 (x64) (Superseded)
* 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 (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* 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 (Superseded)
* 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) (Superseded)
* 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 (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* 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) (Superseded)
* MAJOR [ID:512642403]    MS26-SEP: Cumulative Update for .NET Framework
3.5 and 4.8.1 for Windows 11, version 23H2 - Windows 11 Version 23H2 - .NET
Framework 3.5/4.8.1 - KB5126424 (x64) (Superseded)
* MAJOR [ID:512919501]    5129195: Cumulative Update for Windows 11,
version 25H2 for ARM64 - Windows 11 Version 25H2 - KB5129195 (arm64)
(Superseded)
* MAJOR [ID:512919502]    5129195: Cumulative Update for Windows 11,
version 25H2 - Windows 11 Version 25H2 - KB5129195 (x64) (Superseded)
* MAJOR [ID:512919504]    5129195: Cumulative Update for Windows 11,
version 24H2 for ARM64 - Windows 11 Version 24H2 - KB5129195 (arm64)
(Superseded)
* MAJOR [ID:512919506]    5129195: Cumulative Update for Windows 11,
version 24H2 - Windows 11 Version 24H2 - KB5129195 (x64) (Superseded)
* MAJOR [ID:512923501]    5129235: Cumulative Update for Microsoft server
operating system version 24H2 - Windows Server 2025 - KB5129235 (x64)
(Superseded)
* MAJOR [ID:512923601]    5129236: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5129236 (x64) (Superseded)
* MAJOR [ID:512923603]    5129236: Cumulative Update for Windows 10 Version
21H2 - Windows 10 Version 21H2 - KB5129236 (Superseded)
* MAJOR [ID:512923701]    5129237: Cumulative Update for Microsoft server
operating system version 21H2 - Windows Server 2022 - KB5129237 (x64)
(Superseded)
* MAJOR [ID:512923801]    5129238: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5129238 (Superseded)
* MAJOR [ID:512923802]    5129238: Cumulative Update for Windows Server
2019 - Windows Server 2019 - KB5129238 (x64) (Superseded)
* MAJOR [ID:512923803]    5129238: Cumulative Update for Windows 10 Version
1809 - Windows 10 Version 1809 LTSC - KB5129238 (x64) (Superseded)
* MAJOR [ID:512924201]    5129242: Cumulative Update for Windows 11,
version 23H2 - Windows 11 Version 23H2 - KB5129242 (x64) (Superseded)
* MAJOR [ID:512924202]    5129242: Cumulative Update for Windows 11,
version 23H2 for ARM64 - Windows 11 Version 23H2 - KB5129242 (arm64)
(Superseded)
* MAJOR [ID:512995501]    5129955: Security Update For Exchange Server
Subscription Edition - Exchange Server 2025 - KB5129955 (x64) (Superseded)

Reason for Update:

* Microsoft released October security updates.

Additional Notes:

* "HCL BigFix now officially supports Windows 11, Version 26H2."

Actions to Take:
None


Published site version:
Patches for Windows, Version: 4797

Additional links:


Application Engineering Team
HCL BigFix
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