# KB4580346: October 2020 cumulative update for Windows 10 1607 KB4580346, released October 13, 2020, fixes 42 CVEs across 8 products. One of them is being exploited (CVE-2020-1147); 1 on CISA KEV. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/fix/microsoft/kb4580346 - Platform: Microsoft - Released: Oct 13, 2020 - Priority: Patch now (Closes CVE-2020-1147, exploited (CISA KEV)) - CVEs: 42, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4580346 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Microsoft .NET Framework 3.5 AND 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-3.5-and-4.6.2-4.7-4.7.1-4.7.2-on-windows-10-version-1607-for-32-bit-systems.md) | | 14393.3986 | | [Microsoft .NET Framework 3.5 AND 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-3.5-and-4.6.2-4.7-4.7.1-4.7.2-on-windows-10-version-1607-for-x64-based-systems.md) | | 14393.3986 | | [Microsoft .NET Framework 3.5 AND 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-3.5-and-4.6.2-4.7-4.7.1-4.7.2-on-windows-server-2016.md) | | 14393.3986 | | [Microsoft .NET Framework 3.5 AND 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-3.5-and-4.6.2-4.7-4.7.1-4.7.2-on-windows-server-2016-server-core-installation.md) | | 14393.3986 | | [Windows 10 Version 1607 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-32-bit-systems.md) | | 14393.3986 | | [Windows 10 Version 1607 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1607-for-x64-based-systems.md) | | 14393.3986 | | [Windows Server 2016](https://patchblox.com/security/data/product/microsoft/windows-server-2016.md) | | 14393.3986 | | [Windows Server 2016 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2016-server-core-installation.md) | | 14393.3986 | ## 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-2020-16896](https://patchblox.com/security/data/cve/CVE-2020-16896.md) | Urgent | Windows RDP | 7.5 | 0.1260 | More likely | | [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-2020-16891](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-2020-16894](https://patchblox.com/security/data/cve/CVE-2020-16894.md) | High | Windows Hyper-V | 7.7 | 0.0494 | | | [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-2020-16885](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-2020-16916](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-2020-16980](https://patchblox.com/security/data/cve/CVE-2020-16980.md) | High | Microsoft Windows | 7.8 | 0.0090 | | | [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-2020-16897](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 2026-11-07T18:46:35Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data 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.