.NET Framework September 2018 Security and Quality Rollup

Tara Overfield


Updated: September 21, 2018

Today, we are releasing the September 2018 Security and Quality Rollup.


CVE-2018-8421 – Windows Remote Code Execution Vulnerability

This security update resolves a vulnerability in Microsoft .NET Framework that could allow remote code execution when .NET Framework processes untrusted input. An attacker who successfully exploits this vulnerability in software by using .NET Framework could take control of an affected system. The attacker could then install programs; view, change, or delete data; or create new accounts that have full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.


Getting the Update

The Security and Quality Rollup is available via Windows Update, Windows Server Update Services, Microsoft Update Catalog, and Docker.

Microsoft Update Catalog

You can get the update via the Microsoft Update Catalog. For Windows 10, .NET Framework updates are part of the Windows 10 Monthly Rollup.

The following table is for Windows 10 and Windows Server 2016+.

Product VersionSecurity and Quality Rollup KB
Windows 10 1803 (April 2018 Update)Catalog 4457128
.NET Framework 3.54457128
.NET Framework 4.7.24457128
Windows 10 1709 (Fall Creators Update)Catalog 4457142
.NET Framework 3.54457142
.NET Framework 4.7.1, 4.7.24457142
Windows 10 1703 (Creators Update)Catalog 4457138
.NET Framework 3.54457138
.NET Framework 4.7, 4.7.1, 4.7.24457138
Windows 10 1607 (Anniversary Update) Windows Server 2016Catalog 4457131
.NET Framework 3.54457131
.NET Framework 4.6.2, 4.7, 4.7.1, 4.7.24457131
Windows 10 1507Catalog 4457132
.NET Framework 3.54457132
.NET Framework 4.6, 4.6.1, 4.6.24457132

The following table is for earlier Windows and Windows Server versions.

Product VersionSecurity and Quality Rollup KBSecurity Only Update KB
Windows 8.1 Windows RT 8.1 Windows Server 2012 R2Catalog 4457920Catalog 4457916
.NET Framework 3.544570454457056
.NET Framework 4.5.244570364457028
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.244570344457026
Windows Server 2012Catalog 4457919Catalog 4457915
.NET Framework 3.544570424457053
.NET Framework 4.5.244570374457029
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.244570334457025
Windows 7 Windows Server 2008 R2Catalog 4457918Catalog 4457914
.NET Framework 3.5.144570444457055
.NET Framework 4.5.244570384457030
.NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.244570354457027
Windows Server 2008Catalog 4457921Catalog 4457917
.NET Framework 2.0, 3.044570434457054
.NET Framework 4.5.244570384457030
.NET Framework 4.644570354457027

Docker Images

We are updating the following .NET Framework Docker images for today’s release:

Note: Look at the “Tags” view in each repository to see the updated Docker image tags.

Previous Monthly Rollups

The last few .NET Framework Monthly updates are listed below for your convenience:


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