Microsoft · Security update · August 14, 2018

KB4343909: August 2018 cumulative update for Windows 10 1803

KB4343909, released August 14, 2018, fixes 44 CVEs across 13 products. 4 of them are being exploited (CVE-2018-8414); 4 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

Patch now4 on CISA KEVKnown ransomware use2 publicly disclosedUnsupported product

CVEs closed

12 rated Critical

Exploited

CVE-2018-8414

Exploitation more likely

Microsoft's assessment

Highest EPSS

0.7262

99th percentile

Priority of the 44 CVEs

Patch now 4
                                Urgent 20
                                High 7
                                Routine 13

Applies to

Product	Build after install
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems	17134.228
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems	17134.228
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems	17134.228
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems	17134.228
Microsoft .NET Framework 3.5 on Windows Server, version 1803 (Server Core Installation)	17134.228
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for 32-bit Systems	17134.228
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems	17134.228
Microsoft .NET Framework 4.7.2 on Windows Server, version 1803 (Server Core Installation)	17134.228
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems	17134.228
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems	17134.228
Windows 10 Version 1803 for 32-bit Systems	17134.228
Windows 10 Version 1803 for x64-based Systems	17134.228
Windows Server, version 1803 (Server Core Installation)	17134.228

CVEs this fix closes

Priority	CVE	Component	Impact	CVSS	EPSS	Exploitation
Patch now	CVE-2018-8414	Windows Shell	Remote Code Execution	4.8	0.7262	KEVDisclosedExploited
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-2018-8350	Microsoft Windows PDF	Remote Code Execution	4.2	0.1977	Exploitation Less Likely
Urgent	CVE-2018-8371	Microsoft Scripting Engine	Remote Code Execution	6.4	0.1538	More likely
Urgent	CVE-2018-8380	Microsoft Scripting Engine	Remote Code Execution	4.2	0.1538	More likely
Urgent	CVE-2018-8381	Microsoft Scripting Engine	Remote Code Execution	4.2	0.1538	More likely
Urgent	CVE-2018-8390	Microsoft Scripting Engine	Remote Code Execution	4.2	0.1538	Exploitation Less 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-2018-8377	Microsoft Edge	Remote Code Execution	4.2	0.1018	Exploitation Less Likely
Urgent	CVE-2018-8387	Microsoft Edge	Remote Code Execution	4.2	0.1018	More likely
Urgent	CVE-2018-8383	Microsoft Edge	Spoofing	4.3	0.0761	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

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/4343909

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