# KB4580330: October 2020 cumulative update for Windows 10 1803 KB4580330, released October 13, 2020, fixes 49 CVEs across 7 products. One of them is being exploited (CVE-2020-1147); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb4580330 - Platform: Microsoft - Released: Oct 13, 2020 - Priority: Patch now (Closes CVE-2020-1147, exploited (CISA KEV)) - CVEs: 49, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4580330 ## Applies to | Product | Release | Fixed in | |---|---|---| | [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) | | 17134.1792 | | [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) | | 17134.1792 | | [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) | | 17134.1792 | | [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) | | 17134.1792 | | [Windows 10 Version 1803 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-32-bit-systems.md) | | 17134.1792 | | [Windows 10 Version 1803 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-arm64-based-systems.md) | | 17134.1792 | | [Windows 10 Version 1803 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1803-for-x64-based-systems.md) | | 17134.1792 | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2020-1147](https://patchblox.com/security/data/cve/CVE-2020-1147.md) | Patch now | .NET Framework | 8.8 | 0.9580 | CISA KEV | | [CVE-2020-16899](https://patchblox.com/security/data/cve/CVE-2020-16899.md) | Urgent | Microsoft Windows | 7.5 | 0.1345 | More likely | | [CVE-2020-16896](https://patchblox.com/security/data/cve/CVE-2020-16896.md) | Urgent | Windows RDP | 7.5 | 0.1260 | More likely | | [CVE-2020-16898](https://patchblox.com/security/data/cve/CVE-2020-16898.md) | Urgent | Microsoft Windows | 8.8 | 0.1094 | | | [CVE-2020-16915](https://patchblox.com/security/data/cve/CVE-2020-16915.md) | Urgent | Windows Media Player | 7.8 | 0.0984 | | | [CVE-2020-16968](https://patchblox.com/security/data/cve/CVE-2020-16968.md) | Urgent | Microsoft Windows Codecs Library | 7.8 | 0.0487 | | | [CVE-2020-16911](https://patchblox.com/security/data/cve/CVE-2020-16911.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.0445 | | | [CVE-2020-16967](https://patchblox.com/security/data/cve/CVE-2020-16967.md) | Urgent | Microsoft Windows Codecs Library | 7.8 | 0.0421 | | | [CVE-2020-16923](https://patchblox.com/security/data/cve/CVE-2020-16923.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0383 | | | [CVE-2020-16907](https://patchblox.com/security/data/cve/CVE-2020-16907.md) | Urgent | Microsoft Windows | 7.8 | 0.0100 | More likely | | [CVE-2020-16913](https://patchblox.com/security/data/cve/CVE-2020-16913.md) | Urgent | Windows Kernel | 7.8 | 0.0100 | More likely | | [CVE-2020-16891](https://patchblox.com/security/data/cve/CVE-2020-16891.md) | Urgent | Windows Hyper-V | 8.8 | 0.0095 | | | [CVE-2020-16922](https://patchblox.com/security/data/cve/CVE-2020-16922.md) | Urgent | Microsoft Windows | 5.3 | 0.0081 | More likely | | [CVE-2020-16927](https://patchblox.com/security/data/cve/CVE-2020-16927.md) | High | Windows RDP | 7.5 | 0.0592 | | | [CVE-2020-1167](https://patchblox.com/security/data/cve/CVE-2020-1167.md) | High | Microsoft Graphics Component | 7.8 | 0.0472 | | | [CVE-2020-16924](https://patchblox.com/security/data/cve/CVE-2020-16924.md) | High | Microsoft Windows | 7.8 | 0.0412 | | | [CVE-2020-16939](https://patchblox.com/security/data/cve/CVE-2020-16939.md) | High | Group Policy | 7.8 | 0.0242 | | | [CVE-2020-16940](https://patchblox.com/security/data/cve/CVE-2020-16940.md) | High | Microsoft Windows | 7.8 | 0.0155 | | | [CVE-2020-16920](https://patchblox.com/security/data/cve/CVE-2020-16920.md) | High | Microsoft Windows | 7.8 | 0.0142 | | | [CVE-2020-16895](https://patchblox.com/security/data/cve/CVE-2020-16895.md) | High | Microsoft Windows | 7.8 | 0.0103 | | | [CVE-2020-16885](https://patchblox.com/security/data/cve/CVE-2020-16885.md) | High | Microsoft Windows | 7.8 | 0.0102 | Disclosed | | [CVE-2020-16935](https://patchblox.com/security/data/cve/CVE-2020-16935.md) | High | Microsoft Windows | 7.8 | 0.0100 | | | [CVE-2020-16890](https://patchblox.com/security/data/cve/CVE-2020-16890.md) | High | Windows Secure Kernel Mode | 7.8 | 0.0100 | | | [CVE-2020-16916](https://patchblox.com/security/data/cve/CVE-2020-16916.md) | High | Windows COM | 7.8 | 0.0098 | | | [CVE-2020-0764](https://patchblox.com/security/data/cve/CVE-2020-0764.md) | High | Microsoft Windows | 7.8 | 0.0096 | | | [CVE-2020-16902](https://patchblox.com/security/data/cve/CVE-2020-16902.md) | High | Windows Installer | 7.8 | 0.0094 | | | [CVE-2020-16976](https://patchblox.com/security/data/cve/CVE-2020-16976.md) | High | Microsoft Windows | 7.8 | 0.0093 | | | [CVE-2020-16876](https://patchblox.com/security/data/cve/CVE-2020-16876.md) | High | Microsoft Windows | 7.1 | 0.0092 | | | [CVE-2020-16887](https://patchblox.com/security/data/cve/CVE-2020-16887.md) | High | Microsoft Windows | 7.8 | 0.0092 | | | [CVE-2020-16892](https://patchblox.com/security/data/cve/CVE-2020-16892.md) | High | Windows Kernel | 7.8 | 0.0091 | | | [CVE-2020-16912](https://patchblox.com/security/data/cve/CVE-2020-16912.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-16972](https://patchblox.com/security/data/cve/CVE-2020-16972.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-16974](https://patchblox.com/security/data/cve/CVE-2020-16974.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-16975](https://patchblox.com/security/data/cve/CVE-2020-16975.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-1243](https://patchblox.com/security/data/cve/CVE-2020-1243.md) | High | Windows Hyper-V | 7.8 | 0.0090 | | | [CVE-2020-16936](https://patchblox.com/security/data/cve/CVE-2020-16936.md) | High | Microsoft Windows | 7.8 | 0.0090 | | | [CVE-2020-1080](https://patchblox.com/security/data/cve/CVE-2020-1080.md) | High | Microsoft Windows | 8.8 | 0.0089 | | | [CVE-2020-1047](https://patchblox.com/security/data/cve/CVE-2020-1047.md) | High | Windows Kernel | 7.8 | 0.0089 | | | [CVE-2020-16909](https://patchblox.com/security/data/cve/CVE-2020-16909.md) | High | Microsoft Windows | 7.8 | 0.0087 | Disclosed | | [CVE-2020-16973](https://patchblox.com/security/data/cve/CVE-2020-16973.md) | High | Microsoft Windows | 7.8 | 0.0087 | | | [CVE-2020-16900](https://patchblox.com/security/data/cve/CVE-2020-16900.md) | High | Microsoft Windows | 7.0 | 0.0071 | | | [CVE-2020-16937](https://patchblox.com/security/data/cve/CVE-2020-16937.md) | Routine | .NET Framework | 4.7 | 0.0329 | Disclosed | | [CVE-2020-16910](https://patchblox.com/security/data/cve/CVE-2020-16910.md) | Routine | Windows Kernel | 6.2 | 0.0279 | | | [CVE-2020-16889](https://patchblox.com/security/data/cve/CVE-2020-16889.md) | Routine | Windows Kernel | 5.5 | 0.0136 | | | [CVE-2020-16914](https://patchblox.com/security/data/cve/CVE-2020-16914.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0136 | | | [CVE-2020-16919](https://patchblox.com/security/data/cve/CVE-2020-16919.md) | Routine | Microsoft Windows | 5.5 | 0.0125 | | | [CVE-2020-16921](https://patchblox.com/security/data/cve/CVE-2020-16921.md) | Routine | Microsoft Windows | 5.5 | 0.0125 | | | [CVE-2020-16897](https://patchblox.com/security/data/cve/CVE-2020-16897.md) | Routine | Microsoft Windows | 5.5 | 0.0124 | | | [CVE-2020-16905](https://patchblox.com/security/data/cve/CVE-2020-16905.md) | Routine | Windows Error Reporting | 6.8 | 0.0101 | | --- Data as of 2026-11-07T12:40:37Z 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.