Microsoft · Security update · August 14, 2018

KB4343887: August 2018 cumulative update for Windows 10 1607

KB4343887, released August 14, 2018, fixes 37 CVEs across 18 products. 3 of them are being exploited (CVE-2018-8373); 3 on CISA KEV. Patch Radar priority: Patch now.

Patch now3 on CISA KEVKnown ransomware use1 publicly disclosed

CVEs closed

7 rated Critical

Exploited

CVE-2018-8373

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.6790

99th percentile

Priority of the 37 CVEs

Patch now 3
                                Urgent 14
                                High 5
                                Routine 15

Applies to

Product	Build after install
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems	14393.2430
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems	14393.2430
Internet Explorer 11 on Windows Server 2016	14393.2430
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems	14393.2430
Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems	14393.2430
Microsoft .NET Framework 3.5 on Windows Server 2016	14393.2430
Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation)	14393.2430
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems	14393.2430
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems	14393.2430
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016	14393.2430
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)	14393.2430
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems	14393.2430
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems	14393.2430
Microsoft Edge (EdgeHTML-based) on Windows Server 2016	14393.2430
Windows 10 Version 1607 for 32-bit Systems	14393.2430
Windows 10 Version 1607 for x64-based Systems	14393.2430
Windows Server 2016	14393.2430
Windows Server 2016 (Server Core installation)	14393.2430

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2018-8373	Microsoft Scripting Engine	Remote Code Execution	6.4	0.6177	KEVDisclosedExploited
Patch now	CVE-2018-8405	Microsoft Graphics Component	Elevation of Privilege	7.0	0.0344	KEVRansomwareExploited
Patch now	CVE-2018-8406	Microsoft Graphics Component	Elevation of Privilege	7.0	0.0344	KEVRansomwareExploited
Urgent	CVE-2018-8355	Microsoft Scripting Engine	Remote Code Execution	4.2	0.6790	More likely
Urgent	CVE-2018-8353	Microsoft Scripting Engine	Remote Code Execution	6.4	0.6734	More likely
Urgent	CVE-2018-8389	Microsoft Scripting Engine	Remote Code Execution	6.4	0.3035	More likely
Urgent	CVE-2018-8266	Microsoft Scripting Engine	Remote Code Execution	4.2	0.2868	More likely
Urgent	CVE-2018-8372	Microsoft Scripting Engine	Remote Code Execution	4.2	0.2628	More likely
Urgent	CVE-2018-8344	Microsoft Graphics Component	Remote Code Execution	7.8	0.2298	More likely
Urgent	CVE-2018-8371	Microsoft Scripting Engine	Remote Code Execution	6.4	0.1538	More likely
Urgent	CVE-2018-8381	Microsoft Scripting Engine	Remote Code Execution	4.2	0.1538	More likely
Urgent	CVE-2018-8385	Microsoft Scripting Engine	Remote Code Execution	7.5	0.1517	More likely
Urgent	CVE-2018-8345	Microsoft Windows	Remote Code Execution	7.5	0.1490	More likely
Urgent	CVE-2018-8403	Microsoft Browsers	Remote Code Execution	4.2	0.1337	More likely
Urgent	CVE-2018-8401	Microsoft Graphics Component	Elevation of Privilege	7.0	0.0209	More likely
Urgent	CVE-2018-8347	Windows Kernel	Elevation of Privilege	7.0	0.0135	More likely
Urgent	CVE-2018-8404	Windows Kernel	Elevation of Privilege	7.0	0.0122	More likely
High	CVE-2018-8349	Windows COM	Remote Code Execution	7.0	0.2340	Exploitation Less Likely
High	CVE-2018-8360	.NET Framework	Information Disclosure	n/a	0.0957	Exploitation Less Likely
High	CVE-2018-8202	.NET Framework	Elevation of Privilege	n/a	0.0131	Exploitation Less Likely
High	CVE-2018-8343	Windows NDIS	Elevation of Privilege	7.0	0.0129	Exploitation Less Likely
High	CVE-2018-8339	Windows Installer	Elevation of Privilege	7.4	0.0116	Exploitation Less Likely
Routine	CVE-2018-8316	Internet Explorer	Remote Code Execution	6.4	0.1450	Exploitation Less Likely
Routine	CVE-2018-8394	Microsoft Graphics Component	Information Disclosure	4.7	0.0851	Exploitation Less Likely
Routine	CVE-2018-8398	Microsoft Graphics Component	Information Disclosure	4.7	0.0851	Exploitation Less Likely

Released the same day

KB3213636
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4018310
Microsoft PowerPoint 2010 Service Pack 2 (32-bit editions), Microsoft PowerPoint 2010 Service Pack 2 (64-bit editions)
KB4018392
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4022195
Microsoft Excel Viewer 2007 Service Pack 3
KB4022198
Microsoft Office 2010 Service Pack 2 (32-bit editions), Microsoft Office 2010 Service Pack 2 (64-bit editions)
KB4022234
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
KB4022236
Microsoft SharePoint Server 2013 Service Pack 1
KB4022238
Microsoft Office Web Apps 2013 Service Pack 1
KB4032212
Microsoft Office Compatibility Pack Service Pack 3
KB4032213
Microsoft Excel Viewer 2007 Service Pack 3
KB4032215
Word Automation Services on Microsoft SharePoint Server 2010 Service Pack 2
KB4032220
Microsoft Office Web Apps 2010 Service Pack 2

Vendor advisory

https://support.microsoft.com/help/4343887

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