Content Release: ESU Patching Add-On for Windows 2012 published 2026-10-14

Release Announcements Patch (Release Announcements)
1

Content in the ESU Patching Add-on for Windows 2012 site has been added:

MS26-OCT: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 - IE 11 - KB5126773 (x64)
MS26-OCT: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 R2 - IE 11 - KB5126773 (x64)
MS26-OCT: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 - IE 11 - KB5126773 (x64) (Unentitled)
MS26-OCT: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 R2 - IE 11 - KB5126773 (x64) (Unentitled)
MS26-OCT: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 - KB5126835 (x64)
MS26-OCT: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 - KB5126835 (x64) (Unentitled)
MS26-OCT: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 R2 - KB5126836 (x64)
MS26-OCT: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 R2 - KB5126836 (x64) (Unentitled)
MS26-OCT: Servicing Stack Update - Windows Server 2012 R2 - KB5127356 (x64)
MS26-OCT: Servicing Stack Update - Windows Server 2012 - KB5127357 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 3.5.1 - KB5127660 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 3.5.1 - KB5127660 (x64) (Unentitled)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 3.5.1 - KB5127664 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 3.5.1 - KB5127664 (x64) (Unentitled)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.6/4.7 - KB5127667 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.6/4.7 - KB5127667 (x64) (Unentitled)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.6/4.7 - KB5127668 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.6/4.7 - KB5127668 (x64) (Unentitled)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.8 - KB5127686 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.8 - KB5127686 (x64) (Unentitled)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.8 - KB5127688 (x64)
MS26-OCT: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.8 - KB5127688 (x64) (Unentitled)

Content in the ESU Patching Add-on for Windows 2012 site has been superseded:

MS26-AUG: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 3.5.1 - KB5120695 (x64) (Superseded)
MS26-AUG: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 3.5.1 - KB5120695 (x64) (Unentitled) (Superseded)
MS26-AUG: Security and Quality Rollup - Windows Server 2012 - .NET Framework 3.5.1 - KB5120716 (x64) (Superseded)
MS26-AUG: Security and Quality Rollup - Windows Server 2012 - .NET Framework 3.5.1 - KB5120716 (x64) (Unentitled) (Superseded)
MS26-SEP: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 - IE 11 - KB5123038 (x64) (Superseded)
MS26-SEP: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 R2 - IE 11 - KB5123038 (x64) (Superseded)
MS26-SEP: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 - IE 11 - KB5123038 (x64) (Unentitled) (Superseded)
MS26-SEP: Cumulative Security Update for Internet Explorer 11 - Windows Server 2012 R2 - IE 11 - KB5123038 (x64) (Unentitled) (Superseded)
MS26-SEP: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 - KB5123065 (x64) (Superseded)
MS26-SEP: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 - KB5123065 (x64) (Unentitled) (Superseded)
MS26-SEP: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 R2 - KB5123066 (x64) (Superseded)
MS26-SEP: Security Monthly Quality Rollup - Monthly Rollup - Windows Server 2012 R2 - KB5123066 (x64) (Unentitled) (Superseded)
MS26-SEP: Servicing Stack Update - Windows Server 2012 R2 - KB5123499 (x64) (Superseded)
MS26-SEP: Servicing Stack Update - Windows Server 2012 - KB5123602 (x64) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.6/4.7 - KB5126044 (x64) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.6/4.7 - KB5126044 (x64) (Unentitled) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.6/4.7 - KB5126045 (x64) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.6/4.7 - KB5126045 (x64) (Unentitled) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.8 - KB5126049 (x64) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 - .NET Framework 4.8 - KB5126049 (x64) (Unentitled) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.8 - KB5126051 (x64) (Superseded)
MS26-SEP: Security and Quality Rollup - Windows Server 2012 R2 - .NET Framework 4.8 - KB5126051 (x64) (Unentitled) (Superseded)
5129243: Update for Windows Server 2012 R2 - Windows Server 2012 R2 - KB5129243 (x64) (Superseded)
5129243: Update for Windows Server 2012 R2 - Windows Server 2012 R2 - KB5129243 (x64) (Unentitled) (Superseded)
5129244: Update for Windows Server 2012 - Windows Server 2012 - KB5129244 (x64) (Superseded)
5129244: Update for Windows Server 2012 - Windows Server 2012 - KB5129244 (x64) (Unentitled) (Superseded)

Reason for Update:
Microsoft released Extended Support Updates on September 08th Patch Tuesday.

Actions to Take:
Update any baselines containing the superseded fixlets.

Published site version:
ESU Patching Add-on for Windows 2012, version 63

Additional links:
None

Application Engineering Team
BigFix

2

Not sure if anyone else is already facing this but here it is… Microsoft apparently released the patch on the 13th ~ 6pm BST/ 10am Pacific / 5pm UTC and planned (and have already done so) deactivated all ESU licenses as of 12am UTC time on 14th… So while there are patches; we have the fixlets for them; you can’t patch! How on Earth are they expecting you to have patched all servers within 7 hours of patch release?!? We’ve raised critical case with Microsoft but I don’t rate our chances of them changing their “policy” on it…

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