# KB4512578: September 2019 cumulative update for Windows 10 1809 KB4512578, released September 10, 2019, fixes 55 CVEs across 13 products. 3 of them are being exploited (CVE-2019-1215); 3 on CISA KEV. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/fix/microsoft/kb4512578 - Platform: Microsoft - Released: Sep 10, 2019 - Priority: Patch now (Closes CVE-2019-1215, exploited (CISA KEV, ransomware)) - CVEs: 55, exploited: 3, on CISA KEV: 3 - Vendor advisory: https://support.microsoft.com/help/4512578 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-32-bit-systems.md) | | 17763.737 | | [Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-arm64-based-systems.md) | | 17763.737 | | [Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1809-for-x64-based-systems.md) | | 17763.737 | | [Internet Explorer 11 on Windows Server 2019](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2019.md) | | 17763.737 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-32-bit-systems.md) | | 17763.737 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-arm64-based-systems.md) | | 17763.737 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1809-for-x64-based-systems.md) | | 17763.737 | | [Microsoft Edge (EdgeHTML-based) on Windows Server 2019](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-server-2019.md) | | 17763.737 | | [Windows 10 Version 1809 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1809-for-32-bit-systems.md) | | 17763.737 | | [Windows 10 Version 1809 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1809-for-arm64-based-systems.md) | | 17763.737 | | [Windows 10 Version 1809 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1809-for-x64-based-systems.md) | | 17763.737 | | [Windows Server 2019](https://patchblox.com/security/data/product/microsoft/windows-server-2019.md) | | 17763.737 | | [Windows Server 2019 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2019-server-core-installation.md) | | 17763.737 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2019-1215](https://patchblox.com/security/data/cve/CVE-2019-1215.md) | Patch now | Microsoft Windows | 7.8 | 0.1925 | CISA KEV, Ransomware | | [CVE-2019-1253](https://patchblox.com/security/data/cve/CVE-2019-1253.md) | Patch now | Microsoft Windows | 7.8 | 0.1162 | CISA KEV, Ransomware, Disclosed | | [CVE-2019-1214](https://patchblox.com/security/data/cve/CVE-2019-1214.md) | Patch now | Windows Common Log File System Driver | 7.8 | 0.0142 | CISA KEV | | [CVE-2019-1221](https://patchblox.com/security/data/cve/CVE-2019-1221.md) | Urgent | Microsoft Scripting Engine | 7.5 | 0.1926 | | | [CVE-2019-1280](https://patchblox.com/security/data/cve/CVE-2019-1280.md) | Urgent | Microsoft Windows | 7.3 | 0.1898 | | | [CVE-2019-0787](https://patchblox.com/security/data/cve/CVE-2019-0787.md) | Urgent | Windows RDP | 7.5 | 0.1248 | More likely | | [CVE-2019-0788](https://patchblox.com/security/data/cve/CVE-2019-0788.md) | Urgent | Windows RDP | 7.5 | 0.1248 | More likely | | [CVE-2019-1290](https://patchblox.com/security/data/cve/CVE-2019-1290.md) | Urgent | Windows RDP | 7.5 | 0.1248 | More likely | | [CVE-2019-1291](https://patchblox.com/security/data/cve/CVE-2019-1291.md) | Urgent | Windows RDP | 7.5 | 0.1248 | More likely | | [CVE-2019-1138](https://patchblox.com/security/data/cve/CVE-2019-1138.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0867 | | | [CVE-2019-1217](https://patchblox.com/security/data/cve/CVE-2019-1217.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0867 | | | [CVE-2019-1237](https://patchblox.com/security/data/cve/CVE-2019-1237.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0867 | | | [CVE-2019-1298](https://patchblox.com/security/data/cve/CVE-2019-1298.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0867 | | | [CVE-2019-1300](https://patchblox.com/security/data/cve/CVE-2019-1300.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0867 | | | [CVE-2019-1219](https://patchblox.com/security/data/cve/CVE-2019-1219.md) | Urgent | Microsoft Windows | 5.5 | 0.0170 | More likely | | [CVE-2019-1285](https://patchblox.com/security/data/cve/CVE-2019-1285.md) | Urgent | Windows Kernel | 7.8 | 0.0094 | More likely | | [CVE-2019-1243](https://patchblox.com/security/data/cve/CVE-2019-1243.md) | High | Microsoft JET Database Engine | 7.8 | 0.1845 | | | [CVE-2019-1250](https://patchblox.com/security/data/cve/CVE-2019-1250.md) | High | Microsoft JET Database Engine | 7.8 | 0.1845 | | | [CVE-2019-1241](https://patchblox.com/security/data/cve/CVE-2019-1241.md) | High | Microsoft JET Database Engine | 7.8 | 0.1724 | | | [CVE-2019-1246](https://patchblox.com/security/data/cve/CVE-2019-1246.md) | High | Microsoft JET Database Engine | 7.8 | 0.1264 | | | [CVE-2019-1240](https://patchblox.com/security/data/cve/CVE-2019-1240.md) | High | Microsoft JET Database Engine | 7.8 | 0.1192 | | | [CVE-2019-1242](https://patchblox.com/security/data/cve/CVE-2019-1242.md) | High | Microsoft JET Database Engine | 7.8 | 0.1192 | | | [CVE-2019-1247](https://patchblox.com/security/data/cve/CVE-2019-1247.md) | High | Microsoft JET Database Engine | 7.8 | 0.1192 | | | [CVE-2019-1248](https://patchblox.com/security/data/cve/CVE-2019-1248.md) | High | Microsoft JET Database Engine | 7.8 | 0.1192 | | | [CVE-2019-1249](https://patchblox.com/security/data/cve/CVE-2019-1249.md) | High | Microsoft JET Database Engine | 7.8 | 0.1192 | | | [CVE-2019-1292](https://patchblox.com/security/data/cve/CVE-2019-1292.md) | High | Microsoft Windows | 7.8 | 0.0506 | | | [CVE-2019-1273](https://patchblox.com/security/data/cve/CVE-2019-1273.md) | High | Windows Active Directory | 8.2 | 0.0155 | | | [CVE-2019-1303](https://patchblox.com/security/data/cve/CVE-2019-1303.md) | High | Microsoft Windows | n/a | 0.0122 | | | [CVE-2019-1267](https://patchblox.com/security/data/cve/CVE-2019-1267.md) | High | Microsoft Windows | 7.3 | 0.0118 | | | [CVE-2019-1278](https://patchblox.com/security/data/cve/CVE-2019-1278.md) | High | Microsoft Windows | 7.8 | 0.0110 | | | [CVE-2019-1256](https://patchblox.com/security/data/cve/CVE-2019-1256.md) | High | Windows Kernel | 7.8 | 0.0100 | | | [CVE-2019-1271](https://patchblox.com/security/data/cve/CVE-2019-1271.md) | High | Microsoft Windows | 7.0 | 0.0094 | | | [CVE-2019-1232](https://patchblox.com/security/data/cve/CVE-2019-1232.md) | High | Visual Studio | 7.8 | 0.0083 | | | [CVE-2019-1277](https://patchblox.com/security/data/cve/CVE-2019-1277.md) | High | Microsoft Windows | 7.8 | 0.0081 | | | [CVE-2019-1287](https://patchblox.com/security/data/cve/CVE-2019-1287.md) | High | Microsoft Windows | 7.8 | 0.0081 | | | [CVE-2019-1289](https://patchblox.com/security/data/cve/CVE-2019-1289.md) | High | Microsoft Windows | 7.0 | 0.0073 | | | [CVE-2019-1235](https://patchblox.com/security/data/cve/CVE-2019-1235.md) | High | Microsoft Windows | 7.8 | 0.0062 | Disclosed | | [CVE-2019-1252](https://patchblox.com/security/data/cve/CVE-2019-1252.md) | Routine | Microsoft Graphics Component | 5.5 | 0.6037 | | | [CVE-2019-1245](https://patchblox.com/security/data/cve/CVE-2019-1245.md) | Routine | Microsoft Graphics Component | 6.5 | 0.1289 | | | [CVE-2019-1208](https://patchblox.com/security/data/cve/CVE-2019-1208.md) | Routine | Microsoft Scripting Engine | 6.4 | 0.1260 | | | [CVE-2019-1244](https://patchblox.com/security/data/cve/CVE-2019-1244.md) | Routine | Microsoft Graphics Component | 6.5 | 0.1210 | | | [CVE-2019-1236](https://patchblox.com/security/data/cve/CVE-2019-1236.md) | Routine | Microsoft Scripting Engine | 6.4 | 0.0755 | | | [CVE-2019-1299](https://patchblox.com/security/data/cve/CVE-2019-1299.md) | Routine | Microsoft Edge (HTML-based) | 4.3 | 0.0580 | | | [CVE-2019-1286](https://patchblox.com/security/data/cve/CVE-2019-1286.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0580 | | | [CVE-2019-1220](https://patchblox.com/security/data/cve/CVE-2019-1220.md) | Routine | Microsoft Browsers | 2.4 | 0.0381 | | | [CVE-2019-1293](https://patchblox.com/security/data/cve/CVE-2019-1293.md) | Routine | Windows Kernel | 5.5 | 0.0206 | | | [CVE-2019-1251](https://patchblox.com/security/data/cve/CVE-2019-1251.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0170 | | | [CVE-2019-1274](https://patchblox.com/security/data/cve/CVE-2019-1274.md) | Routine | Windows Kernel | 6.3 | 0.0134 | | | [CVE-2019-1282](https://patchblox.com/security/data/cve/CVE-2019-1282.md) | Routine | Windows Common Log File System Driver | 5.5 | 0.0134 | | | [CVE-2019-1254](https://patchblox.com/security/data/cve/CVE-2019-1254.md) | Routine | Windows Hyper-V | 5.5 | 0.0133 | | | [CVE-2019-1294](https://patchblox.com/security/data/cve/CVE-2019-1294.md) | Routine | Microsoft Windows | 5.3 | 0.0131 | Disclosed | | [CVE-2019-1272](https://patchblox.com/security/data/cve/CVE-2019-1272.md) | Routine | Microsoft Windows | 6.3 | 0.0105 | | | [CVE-2019-1268](https://patchblox.com/security/data/cve/CVE-2019-1268.md) | Routine | Microsoft Windows | 6.5 | 0.0103 | | | [CVE-2019-1269](https://patchblox.com/security/data/cve/CVE-2019-1269.md) | Routine | Microsoft Windows | 6.3 | 0.0094 | | | [CVE-2019-1270](https://patchblox.com/security/data/cve/CVE-2019-1270.md) | Routine | Microsoft Windows | 6.3 | 0.0090 | | --- Data as of 2026-11-07T18:46:35Z UTC. 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