Microsoft Security Update Summary (October 13, 2020)

[German]On October 13, 2020, Microsoft released security updates for Windows clients and servers, for Office, Internet Explorer, etc. Here you will find a compact overview of these updates.


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A list of the updates can be found on this Microsoft page. Details about the update packages for Windows, Office etc. are available in separate blog posts.

Servicing Stack Updates

Microsoft now publishes an overview of all current Servicing Stack Updates (SSUs). The list of SSUs can be found at ADV990001 (but is not always up to date).

Notes on the updates

Windows 10 version 1903 and 1909 use a common core and have an identical set of system files. Therefore, the same security update is delivered for Windows 10 version 190x. Information on how to enable the features of Windows 10 version 1909, which is done by an enablement package update, can be found in this Techcommunity article.

All Windows 10 updates are cumulative. The monthly patchday update contains all security fixes for Windows 10 and all non-security related fixes up to the patchday. In addition to the security patches for the vulnerabilities, the updates contain measures to improve security.

Windows 7 SP1 is no longer supported since January 2020. Only customers with an ESU license (or workarounds) will still receive updates. With ESU Bypass there are probably problems in old variants occasionally, the update can currently not be installed (see this German discussion from last month). Updates can also be downloaded from the Microsoft Update Catalog. The updates for Windows RT 8.1 and Microsoft Office RT are only available via Windows Update.


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Information about the support period for Windows 10 can be found in the Windows Lifecycle Facts Sheet. However, due to the coronavirus crisis, Microsoft has postponed the end of the lifecycle for Windows 10 version 1709 (Enterprise/Education) and Windows 10 version 1809 (Home and Pro) until October 2020.

Fixed vulnerabilities

The October 2020 security updates cover 87 vulnerabilities (CVEs) in Microsoft products. Affected are Microsoft Windows, Office and Office Services and Web applications, Azure features, open source software, Exchange Server, Visual Studio, .NET Framework, Microsoft Dynamics and the Windows Codecs Library. This concludes the series of more than 110 CVEs that have been defined over the last seven months (March to September).

Of these 87 patches, 11 are classified as critical, 75 as important and one as moderately serious. A total of 11 of these patches were reported by the ZDI program. None of these bugs are reported as publicly known or listed as actively attacked. A list of all security updates including CVEs can be found on the Zero Day Initiative blog and Bleeping Computer (details are covered separately in blog posts).

Critical Security Updates

Windows 10 for 32-bit Systems
Windows 10 for x64-based Systems
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1709 for 32-bit Systems
Windows 10 Version 1709 for ARM64-based Systems
Windows 10 Version 1709 for x64-based Systems
Windows 10 Version 1803 for 32-bit Systems
Windows 10 Version 1803 for ARM64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows 10 Version 1903 for 32-bit Systems
Windows 10 Version 1903 for ARM64-based Systems
Windows 10 Version 1903 for x64-based Systems
Windows 10 Version 1909 for 32-bit Systems
Windows 10 Version 1909 for ARM64-based Systems
Windows 10 Version 1909 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 10 Version 2004 for x64-based Systems
Windows 8.1 for 32-bit systems
Windows 8.1 for x64-based systems
Windows RT 8.1
Windows Server 2012
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)
Windows Server 2016
Windows Server 2016 (Server Core installation)
Windows Server 2019
Windows Server 2019 (Server Core installation)
Windows Server, version 1903 (Server Core installation)
Windows Server, version 1909 (Server Core installation)
Windows Server, version 2004 (Server Core installation)
Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Excel 2010 Service Pack 2 (32-bit editions)
Microsoft Excel 2010 Service Pack 2 (64-bit editions)
Microsoft Excel 2013 RT Service Pack 1
Microsoft Excel 2013 Service Pack 1 (32-bit editions)
Microsoft Excel 2013 Service Pack 1 (64-bit editions)
Microsoft Excel 2016 (32-bit edition)
Microsoft Excel 2016 (64-bit edition)
Microsoft Excel Web App 2010 Service Pack 2
Microsoft Office 2010 Service Pack 2 (32-bit editions)
Microsoft Office 2010 Service Pack 2 (64-bit editions)
Microsoft Office 2013 Click-to-Run (C2R) for 32-bit editions
Microsoft Office 2013 Click-to-Run (C2R) for 64-bit editions
Microsoft Office 2013 RT Service Pack 1
Microsoft Office 2013 Service Pack 1 (32-bit editions)
Microsoft Office 2013 Service Pack 1 (64-bit editions)
Microsoft Office 2016 (32-bit edition)
Microsoft Office 2016 (64-bit edition)
Microsoft Office 2016 for Mac
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft Office 2019 for Mac
Microsoft Office Online Server
Microsoft Office Web Apps 2010 Service Pack 2
Microsoft Office Web Apps 2013 Service Pack 1
Microsoft Outlook 2010 Service Pack 2 (32-bit editions)
Microsoft Outlook 2010 Service Pack 2 (64-bit editions)
Microsoft Outlook 2013 RT Service Pack 1
Microsoft Outlook 2013 Service Pack 1 (32-bit editions)
Microsoft Outlook 2013 Service Pack 1 (64-bit editions)
Microsoft Outlook 2016 (32-bit edition)
Microsoft Outlook 2016 (64-bit edition)
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Foundation 2010 Service Pack 2
Microsoft SharePoint Foundation 2013 Service Pack 1
Microsoft SharePoint Server 2010 Service Pack 2
Microsoft SharePoint Server 2019
Microsoft Word 2010 Service Pack 2 (32-bit editions)
Microsoft Word 2010 Service Pack 2 (64-bit editions)
Microsoft Word 2013 RT Service Pack 1
Microsoft Word 2013 Service Pack 1 (32-bit editions)
Microsoft Word 2013 Service Pack 1 (64-bit editions)
Microsoft Word 2016 (32-bit edition)
Microsoft Word 2016 (64-bit edition)
Adobe Flash Player
PowerShellGet 2.2.5

Important Security Updates

Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.0 Service Pack 2
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2
Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2
Microsoft .NET Framework 3.5 AND 4.7.2
Microsoft .NET Framework 3.5 AND 4.8
Microsoft .NET Framework 3.5.1
Microsoft .NET Framework 4.5.2
Microsoft .NET Framework 4.6
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
Microsoft .NET Framework 4.8
Microsoft Exchange Server 2013 Cumulative Update 23
Microsoft Exchange Server 2016 Cumulative Update 17
Microsoft Exchange Server 2016 Cumulative Update 18
Microsoft Exchange Server 2019 Cumulative Update 6
Microsoft Exchange Server 2019 Cumulative Update 7
Dynamics 365 Commerce
Microsoft Dynamics 365 (on-premises) version 8.2
Microsoft Dynamics 365 (on-premises) version 9.0
Visual Studio Code
3D Viewer

Similar articles:
Microsoft Office Patchday (October 6, 2020)
Microsoft Security Update Summary (October 13, 2020)
Patchday: Windows 10 Updates (October 13, 2020)
Patchday: Windows 8.1/Server 2012 Updates (Oct. 13, 2020)
Patchday: Updates for Windows 7/Server 2008 R2 (Oct. 13, 2020)
Patchday Microsoft Office Updates (October 13, 2020)


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