# 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. - Web page: https://patchblox.com/security/fix/microsoft/kb4343887 - Platform: Microsoft - Released: Aug 14, 2018 - Priority: Patch now (Closes CVE-2018-8373, exploited (CISA KEV)) - CVEs: 37, exploited: 3, on CISA KEV: 3 - Vendor advisory: https://support.microsoft.com/help/4343887 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1607-for-32-bit-systems.md) | | 14393.2430 | | [Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1607-for-x64-based-systems.md) | | 14393.2430 | | [Internet Explorer 11 on Windows Server 2016](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2016.md) | | 14393.2430 | | [Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1607-for-32-bit-systems.md) | | 14393.2430 | | [Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1607-for-x64-based-systems.md) | | 14393.2430 | | [Microsoft .NET Framework 3.5 on Windows Server 2016](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-server-2016.md) | | 14393.2430 | | [Microsoft .NET Framework 3.5 on Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-server-2016-server-core-installation.md) | | 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](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.6.2-4.7-4.7.1-4.7.2-on-windows-10-version-1607-for-32-bit-systems.md) | | 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](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.6.2-4.7-4.7.1-4.7.2-on-windows-10-version-1607-for-x64-based-systems.md) | | 14393.2430 | | [Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.6.2-4.7-4.7.1-4.7.2-on-windows-server-2016.md) | | 14393.2430 | | [Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.6.2-4.7-4.7.1-4.7.2-on-windows-server-2016-server-core-installation.md) | | 14393.2430 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1607-for-32-bit-systems.md) | | 14393.2430 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1607-for-x64-based-systems.md) | | 14393.2430 | | [Microsoft Edge (EdgeHTML-based) on Windows Server 2016](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-server-2016.md) | | 14393.2430 | | [Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-32-bit-systems.md) | | 14393.2430 | | [Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-x64-based-systems.md) | | 14393.2430 | | [Windows Server 2016](https://patchblox.com/security/data/product/microsoft/windows-server-2016.md) | | 14393.2430 | | [Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2016-server-core-installation.md) | | 14393.2430 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2018-8373](https://patchblox.com/security/data/cve/CVE-2018-8373.md) | Patch now | Microsoft Scripting Engine | 6.4 | 0.6177 | CISA KEV, Disclosed | | [CVE-2018-8405](https://patchblox.com/security/data/cve/CVE-2018-8405.md) | Patch now | Microsoft Graphics Component | 7.0 | 0.0344 | CISA KEV, Ransomware | | [CVE-2018-8406](https://patchblox.com/security/data/cve/CVE-2018-8406.md) | Patch now | Microsoft Graphics Component | 7.0 | 0.0344 | CISA KEV, Ransomware | | [CVE-2018-8355](https://patchblox.com/security/data/cve/CVE-2018-8355.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.6790 | More likely | | [CVE-2018-8353](https://patchblox.com/security/data/cve/CVE-2018-8353.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.6734 | More likely | | [CVE-2018-8389](https://patchblox.com/security/data/cve/CVE-2018-8389.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.3035 | More likely | | [CVE-2018-8266](https://patchblox.com/security/data/cve/CVE-2018-8266.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.2868 | More likely | | [CVE-2018-8372](https://patchblox.com/security/data/cve/CVE-2018-8372.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.2628 | More likely | | [CVE-2018-8344](https://patchblox.com/security/data/cve/CVE-2018-8344.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.2298 | More likely | | [CVE-2018-8371](https://patchblox.com/security/data/cve/CVE-2018-8371.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.1538 | More likely | | [CVE-2018-8381](https://patchblox.com/security/data/cve/CVE-2018-8381.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1538 | More likely | | [CVE-2018-8385](https://patchblox.com/security/data/cve/CVE-2018-8385.md) | Urgent | Microsoft Scripting Engine | 7.5 | 0.1517 | More likely | | [CVE-2018-8345](https://patchblox.com/security/data/cve/CVE-2018-8345.md) | Urgent | Microsoft Windows | 7.5 | 0.1490 | More likely | | [CVE-2018-8403](https://patchblox.com/security/data/cve/CVE-2018-8403.md) | Urgent | Microsoft Browsers | 4.2 | 0.1337 | More likely | | [CVE-2018-8401](https://patchblox.com/security/data/cve/CVE-2018-8401.md) | Urgent | Microsoft Graphics Component | 7.0 | 0.0209 | More likely | | [CVE-2018-8347](https://patchblox.com/security/data/cve/CVE-2018-8347.md) | Urgent | Windows Kernel | 7.0 | 0.0135 | More likely | | [CVE-2018-8404](https://patchblox.com/security/data/cve/CVE-2018-8404.md) | Urgent | Windows Kernel | 7.0 | 0.0122 | More likely | | [CVE-2018-8349](https://patchblox.com/security/data/cve/CVE-2018-8349.md) | High | Windows COM | 7.0 | 0.2340 | | | [CVE-2018-8360](https://patchblox.com/security/data/cve/CVE-2018-8360.md) | High | .NET Framework | n/a | 0.0957 | | | [CVE-2018-8202](https://patchblox.com/security/data/cve/CVE-2018-8202.md) | High | .NET Framework | n/a | 0.0131 | | | [CVE-2018-8343](https://patchblox.com/security/data/cve/CVE-2018-8343.md) | High | Windows NDIS | 7.0 | 0.0129 | | | [CVE-2018-8339](https://patchblox.com/security/data/cve/CVE-2018-8339.md) | High | Windows Installer | 7.4 | 0.0116 | | | [CVE-2018-8316](https://patchblox.com/security/data/cve/CVE-2018-8316.md) | Routine | Internet Explorer | 6.4 | 0.1450 | | | [CVE-2018-8394](https://patchblox.com/security/data/cve/CVE-2018-8394.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0851 | | | [CVE-2018-8398](https://patchblox.com/security/data/cve/CVE-2018-8398.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0851 | | | [CVE-2018-8351](https://patchblox.com/security/data/cve/CVE-2018-8351.md) | Routine | Microsoft Browsers | 4.2 | 0.0839 | | | [CVE-2018-8357](https://patchblox.com/security/data/cve/CVE-2018-8357.md) | Routine | Microsoft Browsers | 3.0 | 0.0829 | | | [CVE-2018-8340](https://patchblox.com/security/data/cve/CVE-2018-8340.md) | Routine | Windows Authentication Methods | 6.5 | 0.0789 | | | [CVE-2018-0952](https://patchblox.com/security/data/cve/CVE-2018-0952.md) | Routine | Windows Diagnostic Hub | 6.7 | 0.0623 | | | [CVE-2018-8358](https://patchblox.com/security/data/cve/CVE-2018-8358.md) | Routine | Microsoft Edge | 4.7 | 0.0581 | | | [CVE-2018-8370](https://patchblox.com/security/data/cve/CVE-2018-8370.md) | Routine | Microsoft Edge | 3.1 | 0.0488 | | | [CVE-2018-8388](https://patchblox.com/security/data/cve/CVE-2018-8388.md) | Routine | Microsoft Edge | 5.4 | 0.0391 | | | [CVE-2018-8341](https://patchblox.com/security/data/cve/CVE-2018-8341.md) | Routine | Windows Kernel | 4.7 | 0.0285 | | | [CVE-2018-8348](https://patchblox.com/security/data/cve/CVE-2018-8348.md) | Routine | Windows Kernel | 4.7 | 0.0235 | | | [CVE-2018-8253](https://patchblox.com/security/data/cve/CVE-2018-8253.md) | Routine | Windows Shell | 4.0 | 0.0193 | | | [CVE-2018-8200](https://patchblox.com/security/data/cve/CVE-2018-8200.md) | Routine | Device Guard | 5.3 | 0.0153 | | | [CVE-2018-8204](https://patchblox.com/security/data/cve/CVE-2018-8204.md) | Routine | Device Guard | 5.3 | 0.0153 | | --- Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.