# KB4580327: October 2020 cumulative update for Windows 10 1507 KB4580327, released October 13, 2020, fixes 35 CVEs across 4 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/kb4580327 - Platform: Microsoft - Released: Oct 13, 2020 - Priority: Patch now (Closes CVE-2020-1147, exploited (CISA KEV)) - CVEs: 35, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4580327 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.6-4.6.1-4.6.2-on-windows-10-for-32-bit-systems.md) | | 10240.18725 | | [Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2 on Windows 10 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-.net-framework-3.5-and-4.6-4.6.1-4.6.2-on-windows-10-for-x64-based-systems.md) | | 10240.18725 | | [Windows 10 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-for-32-bit-systems.md) | | 10240.18725 | | [Windows 10 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-for-x64-based-systems.md) | | 10240.18725 | ## 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-2020-16968](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-2020-16924](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-2020-16935](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-2020-16902](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-2020-16936](https://patchblox.com/security/data/cve/CVE-2020-16936.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 2026-11-07T06:34:28Z 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