Microsoft · Security update · September 12, 2018

KB4457056: September 2018 security update

KB4457056, released September 12, 2018, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: Urgent.

Urgent

CVEs closed

1 rated Critical

Exploited

None reported

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.2908

98th percentile

Applies to

Product
Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems
Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems
Microsoft .NET Framework 3.5 on Windows Server 2012 R2
Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation)

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Urgent	CVE-2018-8421	.NET Framework	Remote Code Execution	n/a	0.2908	Exploitation Less Likely

Released the same day

KB4457025
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)
KB4457026
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 and 1 more
KB4457027
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2, Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 and 3 more
KB4457028
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 4.5.2 on Windows Server 2012 R2 and 1 more
KB4457029
Microsoft .NET Framework 4.5.2 on Windows Server 2012, Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation)
KB4457030
Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1, Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1, Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 and 3 more
KB4457033
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)
KB4457034
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1 and 2 more
KB4457035
Microsoft .NET Framework 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2, Microsoft .NET Framework 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1 and 3 more
KB4457036
Microsoft .NET Framework 4.5.2 on Windows 8.1 for 32-bit systems, Microsoft .NET Framework 4.5.2 on Windows 8.1 for x64-based systems, Microsoft .NET Framework 4.5.2 on Windows RT 8.1 and 2 more
KB4457037
Microsoft .NET Framework 4.5.2 on Windows Server 2012, Microsoft .NET Framework 4.5.2 on Windows Server 2012 (Server Core installation)
KB4457038
Microsoft .NET Framework 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1, Microsoft .NET Framework 4.5.2 on Windows 7 for x64-based Systems Service Pack 1, Microsoft .NET Framework 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 and 3 more

Vendor advisory

https://support.microsoft.com/help/4457056

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