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
44
12 rated Critical
Exploited
4
CVE-2018-8414
Exploitation more likely
17
Vendor assessment
Highest EPSS
0.7262
99th percentile

Priority of the 44 CVEs

Patch now 4 Urgent 20 High 7 Routine 13

Applies to

ProductBuild after install
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems17134.228
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems17134.228
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems17134.228
Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems17134.228
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 Systems17134.228
Microsoft .NET Framework 4.7.2 on Windows 10 Version 1803 for x64-based Systems17134.228
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 Systems17134.228
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems17134.228
Windows 10 Version 1803 for 32-bit Systems17134.228
Windows 10 Version 1803 for x64-based Systems17134.228
Windows Server, version 1803 (Server Core Installation)17134.228

CVEs this fix closes

PriorityCVEComponentImpactCVSSEPSSExploitation
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
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