# KB4457142: September 2018 cumulative update for Windows 10 1709 KB4457142, released September 11, 2018, fixes 41 CVEs across 13 products. One of them is being exploited (CVE-2018-8440); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb4457142 - Platform: Microsoft - Released: Sep 11, 2018 - Priority: Patch now (Closes CVE-2018-8440, exploited (CISA KEV, ransomware)) - CVEs: 41, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4457142 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1709-for-32-bit-systems.md) | | 16299.665 | | [Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1709-for-x64-based-systems.md) | | 16299.665 | | [Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1709-for-32-bit-systems.md) | | 16299.665 | | [Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-10-version-1709-for-x64-based-systems.md) | | 16299.665 | | [Microsoft .NET Framework 3.5 on Windows Server, version 1709 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-on-windows-server-version-1709-server-core-installation.md) | | 16299.665 | | [Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.7.1-4.7.2-on-windows-10-version-1709-for-32-bit-systems.md) | | 16299.665 | | [Microsoft .NET Framework 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.7.1-4.7.2-on-windows-10-version-1709-for-x64-based-systems.md) | | 16299.665 | | [Microsoft .NET Framework 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-4.7.1-4.7.2-on-windows-server-version-1709-server-core-installation.md) | | 16299.665 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1709-for-32-bit-systems.md) | | 16299.665 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1709-for-x64-based-systems.md) | | 16299.665 | | [Windows 10 Version 1709 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1709-for-32-bit-systems.md) | | 16299.665 | | [Windows 10 Version 1709 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1709-for-x64-based-systems.md) | | 16299.665 | | [Windows Server, version 1709 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1709-server-core-installation.md) | | 16299.665 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2018-8440](https://patchblox.com/security/data/cve/CVE-2018-8440.md) | Patch now | Microsoft Windows | 7.8 | 0.1853 | CISA KEV, Ransomware, Disclosed | | [CVE-2018-8466](https://patchblox.com/security/data/cve/CVE-2018-8466.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.6902 | More likely | | [CVE-2018-8467](https://patchblox.com/security/data/cve/CVE-2018-8467.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.6902 | More likely | | [CVE-2018-8420](https://patchblox.com/security/data/cve/CVE-2018-8420.md) | Urgent | Microsoft XML Core Services | 7.5 | 0.4890 | More likely | | [CVE-2018-8464](https://patchblox.com/security/data/cve/CVE-2018-8464.md) | Urgent | Microsoft Edge (HTML-based) | 4.2 | 0.4258 | More likely | | [CVE-2018-8421](https://patchblox.com/security/data/cve/CVE-2018-8421.md) | Urgent | .NET Framework | n/a | 0.2908 | | | [CVE-2018-8332](https://patchblox.com/security/data/cve/CVE-2018-8332.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1907 | | | [CVE-2018-8475](https://patchblox.com/security/data/cve/CVE-2018-8475.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1586 | Disclosed | | [CVE-2018-8469](https://patchblox.com/security/data/cve/CVE-2018-8469.md) | Urgent | Microsoft Edge (HTML-based) | 4.3 | 0.1542 | More likely | | [CVE-2018-8354](https://patchblox.com/security/data/cve/CVE-2018-8354.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1495 | More likely | | [CVE-2018-8456](https://patchblox.com/security/data/cve/CVE-2018-8456.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1495 | More likely | | [CVE-2018-8367](https://patchblox.com/security/data/cve/CVE-2018-8367.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1494 | More likely | | [CVE-2018-8465](https://patchblox.com/security/data/cve/CVE-2018-8465.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1463 | More likely | | [CVE-2018-8457](https://patchblox.com/security/data/cve/CVE-2018-8457.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1308 | Disclosed | | [CVE-2018-8461](https://patchblox.com/security/data/cve/CVE-2018-8461.md) | Urgent | Internet Explorer | 7.5 | 0.1290 | More likely | | [CVE-2018-8447](https://patchblox.com/security/data/cve/CVE-2018-8447.md) | Urgent | Internet Explorer | 6.4 | 0.1290 | More likely | | [CVE-2018-8468](https://patchblox.com/security/data/cve/CVE-2018-8468.md) | Urgent | Windows Shell | 4.3 | 0.1177 | More likely | | [CVE-2018-8452](https://patchblox.com/security/data/cve/CVE-2018-8452.md) | Urgent | Microsoft Scripting Engine | 4.3 | 0.0559 | More likely | | [CVE-2018-0965](https://patchblox.com/security/data/cve/CVE-2018-0965.md) | Urgent | Windows Hyper-V | 7.6 | 0.0505 | | | [CVE-2018-8439](https://patchblox.com/security/data/cve/CVE-2018-8439.md) | Urgent | Windows Hyper-V | 7.6 | 0.0431 | | | [CVE-2018-8410](https://patchblox.com/security/data/cve/CVE-2018-8410.md) | Urgent | Microsoft Windows | 7.0 | 0.0398 | More likely | | [CVE-2018-8425](https://patchblox.com/security/data/cve/CVE-2018-8425.md) | Urgent | Microsoft Edge (HTML-based) | 5.3 | 0.0349 | More likely | | [CVE-2018-8470](https://patchblox.com/security/data/cve/CVE-2018-8470.md) | Urgent | Internet Explorer | 4.3 | 0.0327 | More likely | | [CVE-2018-8449](https://patchblox.com/security/data/cve/CVE-2018-8449.md) | Urgent | Device Guard | 5.3 | 0.0311 | More likely | | [CVE-2018-8442](https://patchblox.com/security/data/cve/CVE-2018-8442.md) | Urgent | Windows Kernel | 4.7 | 0.0278 | More likely | | [CVE-2018-8462](https://patchblox.com/security/data/cve/CVE-2018-8462.md) | Urgent | Microsoft Graphics Component | 7.0 | 0.0119 | More likely | | [CVE-2018-8392](https://patchblox.com/security/data/cve/CVE-2018-8392.md) | High | Microsoft JET Database Engine | 7.8 | 0.2276 | | | [CVE-2018-8393](https://patchblox.com/security/data/cve/CVE-2018-8393.md) | High | Microsoft JET Database Engine | 7.8 | 0.2248 | | | [CVE-2018-8455](https://patchblox.com/security/data/cve/CVE-2018-8455.md) | High | Windows Kernel | 7.0 | 0.0109 | | | [CVE-2018-8424](https://patchblox.com/security/data/cve/CVE-2018-8424.md) | Routine | Microsoft Graphics Component | 4.7 | 0.1299 | | | [CVE-2018-8335](https://patchblox.com/security/data/cve/CVE-2018-8335.md) | Routine | Windows SMB Server | 4.8 | 0.0900 | | | [CVE-2018-8438](https://patchblox.com/security/data/cve/CVE-2018-8438.md) | Routine | Microsoft Windows | 5.8 | 0.0717 | | | [CVE-2018-8434](https://patchblox.com/security/data/cve/CVE-2018-8434.md) | Routine | Windows Hyper-V | 5.4 | 0.0349 | | | [CVE-2018-8315](https://patchblox.com/security/data/cve/CVE-2018-8315.md) | Routine | Microsoft Scripting Engine | 4.2 | 0.0318 | | | [CVE-2018-8443](https://patchblox.com/security/data/cve/CVE-2018-8443.md) | Routine | Windows Kernel | 4.7 | 0.0278 | | | [CVE-2018-8446](https://patchblox.com/security/data/cve/CVE-2018-8446.md) | Routine | Windows Kernel | 4.7 | 0.0278 | | | [CVE-2018-8271](https://patchblox.com/security/data/cve/CVE-2018-8271.md) | Routine | Microsoft Windows | 2.5 | 0.0278 | | | [CVE-2018-8433](https://patchblox.com/security/data/cve/CVE-2018-8433.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0263 | | | [CVE-2018-8419](https://patchblox.com/security/data/cve/CVE-2018-8419.md) | Routine | Windows Media | 4.7 | 0.0168 | | | [CVE-2018-8337](https://patchblox.com/security/data/cve/CVE-2018-8337.md) | Routine | Windows Subsystem for Linux | 5.3 | 0.0147 | | | [CVE-2018-8435](https://patchblox.com/security/data/cve/CVE-2018-8435.md) | Routine | Windows Hyper-V | 4.2 | 0.0136 | | --- Data as of 2026-11-07T18:46:35Z UTC. 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