# KB4556807: May 2020 cumulative update for Windows 10 1803 KB4556807, released May 12, 2020, fixes 85 CVEs across 14 products. One of them is being exploited (CVE-2020-1054); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb4556807 - Platform: Microsoft - Released: May 12, 2020 - Priority: Patch now (Closes CVE-2020-1054, exploited (CISA KEV)) - CVEs: 85, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4556807 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1803-for-32-bit-systems.md) | | 17134.1488 | | [Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1803-for-arm64-based-systems.md) | | 17134.1488 | | [Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-10-version-1803-for-x64-based-systems.md) | | 17134.1488 | | [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1803-for-32-bit-systems.md) | | 17134.1488 | | [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1803-for-arm64-based-systems.md) | | 17134.1488 | | [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-10-version-1803-for-x64-based-systems.md) | | 17134.1488 | | [Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.7.2-on-windows-server-version-1803-server-core-installation.md) | | 17134.1488 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1803-for-32-bit-systems.md) | | 17134.1488 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1803-for-arm64-based-systems.md) | | 17134.1488 | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1803-for-x64-based-systems.md) | | 17134.1488 | | [Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-32-bit-systems.md) | | 17134.1488 | | [Windows 10 Version 1803 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-arm64-based-systems.md) | | 17134.1488 | | [Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-x64-based-systems.md) | | 17134.1488 | | [Windows Server, version 1803 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1803-server-core-installation.md) | | 17134.1488 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2020-1054](https://patchblox.com/security/data/cve/CVE-2020-1054.md) | Patch now | Microsoft Graphics Component | 7.0 | 0.5388 | CISA KEV | | [CVE-2020-0605](https://patchblox.com/security/data/cve/CVE-2020-0605.md) | Urgent | .NET Framework | n/a | 0.1840 | | | [CVE-2020-1062](https://patchblox.com/security/data/cve/CVE-2020-1062.md) | Urgent | Internet Explorer | 6.4 | 0.0624 | More likely | | [CVE-2020-1126](https://patchblox.com/security/data/cve/CVE-2020-1126.md) | Urgent | Microsoft Windows | 8.8 | 0.0414 | | | [CVE-2020-1117](https://patchblox.com/security/data/cve/CVE-2020-1117.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.0409 | | | [CVE-2020-1153](https://patchblox.com/security/data/cve/CVE-2020-1153.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0396 | | | [CVE-2020-1028](https://patchblox.com/security/data/cve/CVE-2020-1028.md) | Urgent | Microsoft Windows | 7.8 | 0.0391 | | | [CVE-2020-1136](https://patchblox.com/security/data/cve/CVE-2020-1136.md) | Urgent | Microsoft Windows | 7.8 | 0.0391 | | | [CVE-2020-1035](https://patchblox.com/security/data/cve/CVE-2020-1035.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.0325 | More likely | | [CVE-2020-1058](https://patchblox.com/security/data/cve/CVE-2020-1058.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.0318 | More likely | | [CVE-2020-1060](https://patchblox.com/security/data/cve/CVE-2020-1060.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.0318 | More likely | | [CVE-2020-1037](https://patchblox.com/security/data/cve/CVE-2020-1037.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0224 | | | [CVE-2020-1065](https://patchblox.com/security/data/cve/CVE-2020-1065.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.0224 | | | [CVE-2020-1056](https://patchblox.com/security/data/cve/CVE-2020-1056.md) | Urgent | Microsoft Edge (HTML-based) | 5.4 | 0.0214 | | | [CVE-2020-1143](https://patchblox.com/security/data/cve/CVE-2020-1143.md) | Urgent | Microsoft Windows | 7.0 | 0.0108 | More likely | | [CVE-2020-1135](https://patchblox.com/security/data/cve/CVE-2020-1135.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0098 | More likely | | [CVE-2020-1048](https://patchblox.com/security/data/cve/CVE-2020-1048.md) | High | Microsoft Windows | 7.8 | 0.1650 | | | [CVE-2020-1118](https://patchblox.com/security/data/cve/CVE-2020-1118.md) | High | Microsoft Windows | 8.6 | 0.1515 | | | [CVE-2020-1108](https://patchblox.com/security/data/cve/CVE-2020-1108.md) | High | .NET Core | 7.5 | 0.0646 | | | [CVE-2020-1179](https://patchblox.com/security/data/cve/CVE-2020-1179.md) | High | Microsoft Graphics Component | n/a | 0.0522 | | | [CVE-2020-0909](https://patchblox.com/security/data/cve/CVE-2020-0909.md) | High | Windows Hyper-V | 7.5 | 0.0473 | | | [CVE-2020-1174](https://patchblox.com/security/data/cve/CVE-2020-1174.md) | High | Microsoft JET Database Engine | 7.8 | 0.0380 | | | [CVE-2020-1051](https://patchblox.com/security/data/cve/CVE-2020-1051.md) | High | Microsoft JET Database Engine | 7.8 | 0.0377 | | | [CVE-2020-1175](https://patchblox.com/security/data/cve/CVE-2020-1175.md) | High | Microsoft JET Database Engine | 7.8 | 0.0377 | | | [CVE-2020-1176](https://patchblox.com/security/data/cve/CVE-2020-1176.md) | High | Microsoft JET Database Engine | 7.8 | 0.0377 | | | [CVE-2020-1061](https://patchblox.com/security/data/cve/CVE-2020-1061.md) | High | Windows Scripting | 7.5 | 0.0335 | | | [CVE-2020-1112](https://patchblox.com/security/data/cve/CVE-2020-1112.md) | High | Microsoft Windows | 8.5 | 0.0329 | | | [CVE-2020-1139](https://patchblox.com/security/data/cve/CVE-2020-1139.md) | High | Microsoft Windows | 7.8 | 0.0258 | | | [CVE-2020-1155](https://patchblox.com/security/data/cve/CVE-2020-1155.md) | High | Microsoft Windows | 7.8 | 0.0258 | | | [CVE-2020-1156](https://patchblox.com/security/data/cve/CVE-2020-1156.md) | High | Microsoft Windows | 7.8 | 0.0258 | | | [CVE-2020-1157](https://patchblox.com/security/data/cve/CVE-2020-1157.md) | High | Microsoft Windows | 7.8 | 0.0258 | | | [CVE-2020-1158](https://patchblox.com/security/data/cve/CVE-2020-1158.md) | High | Microsoft Windows | 7.8 | 0.0256 | | | [CVE-2020-1067](https://patchblox.com/security/data/cve/CVE-2020-1067.md) | High | Microsoft Windows | 7.8 | 0.0254 | | | [CVE-2020-1125](https://patchblox.com/security/data/cve/CVE-2020-1125.md) | High | Microsoft Windows | 7.0 | 0.0227 | | | [CVE-2020-1149](https://patchblox.com/security/data/cve/CVE-2020-1149.md) | High | Microsoft Windows | 7.0 | 0.0227 | | | [CVE-2020-1151](https://patchblox.com/security/data/cve/CVE-2020-1151.md) | High | Microsoft Windows | 7.0 | 0.0227 | | | [CVE-2020-1164](https://patchblox.com/security/data/cve/CVE-2020-1164.md) | High | Microsoft Windows | 7.0 | 0.0225 | | | [CVE-2020-1191](https://patchblox.com/security/data/cve/CVE-2020-1191.md) | High | Microsoft Windows | 7.8 | 0.0169 | | | [CVE-2020-1070](https://patchblox.com/security/data/cve/CVE-2020-1070.md) | High | Microsoft Windows | 7.8 | 0.0115 | | | [CVE-2020-1079](https://patchblox.com/security/data/cve/CVE-2020-1079.md) | High | Microsoft Windows | 7.8 | 0.0099 | | | [CVE-2020-1109](https://patchblox.com/security/data/cve/CVE-2020-1109.md) | High | Windows Update Stack | 7.8 | 0.0099 | | | [CVE-2020-1082](https://patchblox.com/security/data/cve/CVE-2020-1082.md) | High | Microsoft Windows | 7.8 | 0.0099 | | | [CVE-2020-1010](https://patchblox.com/security/data/cve/CVE-2020-1010.md) | High | Microsoft Windows | 7.8 | 0.0098 | | | [CVE-2020-1068](https://patchblox.com/security/data/cve/CVE-2020-1068.md) | High | Microsoft Windows | 7.8 | 0.0095 | | | [CVE-2020-1081](https://patchblox.com/security/data/cve/CVE-2020-1081.md) | High | Microsoft Windows | 7.8 | 0.0095 | | | [CVE-2020-1110](https://patchblox.com/security/data/cve/CVE-2020-1110.md) | High | Windows Update Stack | 7.8 | 0.0095 | | | [CVE-2020-1114](https://patchblox.com/security/data/cve/CVE-2020-1114.md) | High | Windows Kernel | 7.8 | 0.0095 | | | [CVE-2020-1137](https://patchblox.com/security/data/cve/CVE-2020-1137.md) | High | Microsoft Windows | 7.8 | 0.0095 | | | [CVE-2020-1142](https://patchblox.com/security/data/cve/CVE-2020-1142.md) | High | Microsoft Graphics Component | 7.8 | 0.0095 | | | [CVE-2020-1154](https://patchblox.com/security/data/cve/CVE-2020-1154.md) | High | Common Log File System Driver | 7.8 | 0.0095 | | | [CVE-2020-1021](https://patchblox.com/security/data/cve/CVE-2020-1021.md) | High | Microsoft Windows | 7.8 | 0.0095 | | | [CVE-2020-1088](https://patchblox.com/security/data/cve/CVE-2020-1088.md) | High | Microsoft Windows | 7.8 | 0.0088 | | | [CVE-2020-1077](https://patchblox.com/security/data/cve/CVE-2020-1077.md) | High | Microsoft Windows | 7.8 | 0.0087 | | | [CVE-2020-1132](https://patchblox.com/security/data/cve/CVE-2020-1132.md) | High | Microsoft Windows | 7.0 | 0.0086 | | | [CVE-2020-1138](https://patchblox.com/security/data/cve/CVE-2020-1138.md) | High | Microsoft Windows | 7.0 | 0.0086 | | | [CVE-2020-1078](https://patchblox.com/security/data/cve/CVE-2020-1078.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1086](https://patchblox.com/security/data/cve/CVE-2020-1086.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1087](https://patchblox.com/security/data/cve/CVE-2020-1087.md) | High | Windows Kernel | 7.8 | 0.0084 | | | [CVE-2020-1090](https://patchblox.com/security/data/cve/CVE-2020-1090.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1124](https://patchblox.com/security/data/cve/CVE-2020-1124.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1134](https://patchblox.com/security/data/cve/CVE-2020-1134.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1144](https://patchblox.com/security/data/cve/CVE-2020-1144.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1184](https://patchblox.com/security/data/cve/CVE-2020-1184.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1185](https://patchblox.com/security/data/cve/CVE-2020-1185.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1186](https://patchblox.com/security/data/cve/CVE-2020-1186.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1187](https://patchblox.com/security/data/cve/CVE-2020-1187.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1188](https://patchblox.com/security/data/cve/CVE-2020-1188.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1189](https://patchblox.com/security/data/cve/CVE-2020-1189.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1190](https://patchblox.com/security/data/cve/CVE-2020-1190.md) | High | Microsoft Windows | 7.8 | 0.0084 | | | [CVE-2020-1113](https://patchblox.com/security/data/cve/CVE-2020-1113.md) | Routine | Windows Task Scheduler | 5.3 | 0.0631 | | | [CVE-2020-0963](https://patchblox.com/security/data/cve/CVE-2020-0963.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0476 | | | [CVE-2020-1064](https://patchblox.com/security/data/cve/CVE-2020-1064.md) | Routine | Internet Explorer | 6.4 | 0.0325 | | | [CVE-2020-1093](https://patchblox.com/security/data/cve/CVE-2020-1093.md) | Routine | Internet Explorer | 6.4 | 0.0325 | | | [CVE-2020-1092](https://patchblox.com/security/data/cve/CVE-2020-1092.md) | Routine | Internet Explorer | 6.4 | 0.0320 | | | [CVE-2020-1059](https://patchblox.com/security/data/cve/CVE-2020-1059.md) | Routine | Microsoft Edge (HTML-based) | 4.3 | 0.0211 | | | [CVE-2020-1096](https://patchblox.com/security/data/cve/CVE-2020-1096.md) | Routine | Microsoft Edge (HTML-based) | 4.2 | 0.0207 | | | [CVE-2020-1141](https://patchblox.com/security/data/cve/CVE-2020-1141.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0202 | | | [CVE-2020-1075](https://patchblox.com/security/data/cve/CVE-2020-1075.md) | Routine | Windows Subsystem for Linux | 5.5 | 0.0134 | | | [CVE-2020-1072](https://patchblox.com/security/data/cve/CVE-2020-1072.md) | Routine | Microsoft Windows | 5.5 | 0.0128 | | | [CVE-2020-1116](https://patchblox.com/security/data/cve/CVE-2020-1116.md) | Routine | Microsoft Windows | 5.5 | 0.0128 | | | [CVE-2020-1076](https://patchblox.com/security/data/cve/CVE-2020-1076.md) | Routine | Microsoft Windows | 5.5 | 0.0110 | | | [CVE-2020-1084](https://patchblox.com/security/data/cve/CVE-2020-1084.md) | Routine | Microsoft Windows | 5.5 | 0.0110 | | | [CVE-2020-1123](https://patchblox.com/security/data/cve/CVE-2020-1123.md) | Routine | Microsoft Windows | 5.5 | 0.0110 | | | [CVE-2020-1131](https://patchblox.com/security/data/cve/CVE-2020-1131.md) | Routine | Microsoft Windows | 5.5 | 0.0109 | | | [CVE-2020-1071](https://patchblox.com/security/data/cve/CVE-2020-1071.md) | Routine | Microsoft Windows | 6.8 | 0.0104 | | --- Data as of 2026-11-08T06:59:42Z UTC. 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