# KB4586845: November 2020 security update KB4586845, released November 10, 2020, fixes 34 CVEs across 9 products. One of them is being exploited (CVE-2020-17087); 1 on CISA KEV. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/fix/microsoft/kb4586845 - Platform: Microsoft - Released: Nov 10, 2020 - Priority: Patch now (Closes CVE-2020-17087, exploited (CISA KEV)) - CVEs: 34, exploited: 1, on CISA KEV: 1 - Vendor advisory: https://support.microsoft.com/help/4586845 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Internet Explorer 11 on Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-32-bit-systems.md) | | | | [Internet Explorer 11 on Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-8.1-for-x64-based-systems.md) | | | | [Internet Explorer 11 on Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-rt-8.1.md) | | | | [Internet Explorer 11 on Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2012-r2.md) | | | | [Windows 8.1 for 32-bit systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-32-bit-systems.md) | | | | [Windows 8.1 for x64-based systems](https://patchblox.com/security/data/product/microsoft/windows-8.1-for-x64-based-systems.md) | | | | [Windows RT 8.1](https://patchblox.com/security/data/product/microsoft/windows-rt-8.1.md) | | | | [Windows Server 2012 R2](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2.md) | | | | [Windows Server 2012 R2 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2012-r2-server-core-installation.md) | | | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2020-17087](https://patchblox.com/security/data/cve/CVE-2020-17087.md) | Patch now | Windows Kernel | 7.8 | 0.0543 | CISA KEV, Disclosed | | [CVE-2020-17051](https://patchblox.com/security/data/cve/CVE-2020-17051.md) | Urgent | Microsoft Windows | 9.8 | 0.1062 | More likely | | [CVE-2020-17042](https://patchblox.com/security/data/cve/CVE-2020-17042.md) | Urgent | Microsoft Windows | 8.8 | 0.0511 | | | [CVE-2020-17052](https://patchblox.com/security/data/cve/CVE-2020-17052.md) | Urgent | Microsoft Scripting Engine | 7.5 | 0.0265 | More likely | | [CVE-2020-17056](https://patchblox.com/security/data/cve/CVE-2020-17056.md) | Urgent | Microsoft Windows | 5.5 | 0.0131 | More likely | | [CVE-2020-17038](https://patchblox.com/security/data/cve/CVE-2020-17038.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0100 | More likely | | [CVE-2020-17088](https://patchblox.com/security/data/cve/CVE-2020-17088.md) | Urgent | Windows Common Log File System Driver | 7.8 | 0.0088 | More likely | | [CVE-2020-17047](https://patchblox.com/security/data/cve/CVE-2020-17047.md) | High | Microsoft Windows | 7.5 | 0.2710 | | | [CVE-2020-16997](https://patchblox.com/security/data/cve/CVE-2020-16997.md) | High | Microsoft Windows | 7.7 | 0.0403 | | | [CVE-2020-17043](https://patchblox.com/security/data/cve/CVE-2020-17043.md) | High | Microsoft Windows | 7.8 | 0.0285 | | | [CVE-2020-17044](https://patchblox.com/security/data/cve/CVE-2020-17044.md) | High | Microsoft Windows | 7.8 | 0.0285 | | | [CVE-2020-17055](https://patchblox.com/security/data/cve/CVE-2020-17055.md) | High | Microsoft Windows | 7.8 | 0.0285 | | | [CVE-2020-17011](https://patchblox.com/security/data/cve/CVE-2020-17011.md) | High | Microsoft Windows | 7.8 | 0.0104 | | | [CVE-2020-17001](https://patchblox.com/security/data/cve/CVE-2020-17001.md) | High | Microsoft Windows | 7.8 | 0.0100 | | | [CVE-2020-17024](https://patchblox.com/security/data/cve/CVE-2020-17024.md) | High | Microsoft Windows | 7.8 | 0.0099 | | | [CVE-2020-17041](https://patchblox.com/security/data/cve/CVE-2020-17041.md) | High | Microsoft Windows | 7.8 | 0.0099 | | | [CVE-2020-17068](https://patchblox.com/security/data/cve/CVE-2020-17068.md) | High | Microsoft Graphics Component | 7.8 | 0.0098 | | | [CVE-2020-17014](https://patchblox.com/security/data/cve/CVE-2020-17014.md) | High | Microsoft Windows | 7.8 | 0.0095 | | | [CVE-2020-17026](https://patchblox.com/security/data/cve/CVE-2020-17026.md) | High | Microsoft Windows | 7.8 | 0.0093 | | | [CVE-2020-17027](https://patchblox.com/security/data/cve/CVE-2020-17027.md) | High | Microsoft Windows | 7.8 | 0.0092 | | | [CVE-2020-17031](https://patchblox.com/security/data/cve/CVE-2020-17031.md) | High | Microsoft Windows | 7.8 | 0.0092 | | | [CVE-2020-17034](https://patchblox.com/security/data/cve/CVE-2020-17034.md) | High | Microsoft Windows | 7.8 | 0.0092 | | | [CVE-2020-17025](https://patchblox.com/security/data/cve/CVE-2020-17025.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-17028](https://patchblox.com/security/data/cve/CVE-2020-17028.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-17032](https://patchblox.com/security/data/cve/CVE-2020-17032.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-17033](https://patchblox.com/security/data/cve/CVE-2020-17033.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-1599](https://patchblox.com/security/data/cve/CVE-2020-1599.md) | Routine | Microsoft Windows | 5.5 | 0.1912 | | | [CVE-2020-17040](https://patchblox.com/security/data/cve/CVE-2020-17040.md) | Routine | Microsoft Windows | 6.5 | 0.0270 | | | [CVE-2020-17029](https://patchblox.com/security/data/cve/CVE-2020-17029.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0139 | | | [CVE-2020-17036](https://patchblox.com/security/data/cve/CVE-2020-17036.md) | Routine | Microsoft Windows | 5.5 | 0.0139 | | | [CVE-2020-17045](https://patchblox.com/security/data/cve/CVE-2020-17045.md) | Routine | Microsoft Windows | 5.5 | 0.0139 | | | [CVE-2020-17000](https://patchblox.com/security/data/cve/CVE-2020-17000.md) | Routine | Microsoft Windows | 5.5 | 0.0131 | | | [CVE-2020-17004](https://patchblox.com/security/data/cve/CVE-2020-17004.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0131 | | | [CVE-2020-17069](https://patchblox.com/security/data/cve/CVE-2020-17069.md) | Routine | Windows NDIS | 5.5 | 0.0111 | | --- 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