# KB4537821: February 2020 security update KB4537821, released February 11, 2020, fixes 54 CVEs across 9 products. 2 of them are being exploited (CVE-2020-0674); 2 on CISA KEV. Patch Radar priority: Patch now. - Web page: https://patchblox.com/security/fix/microsoft/kb4537821 - Platform: Microsoft - Released: Feb 11, 2020 - Priority: Patch now (Closes CVE-2020-0674, exploited (CISA KEV)) - CVEs: 54, exploited: 2, on CISA KEV: 2 - Vendor advisory: https://support.microsoft.com/help/4537821 ## 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-2020-0674](https://patchblox.com/security/data/cve/CVE-2020-0674.md) | Patch now | Internet Explorer | 6.4 | 0.8686 | CISA KEV, Disclosed | | [CVE-2020-0683](https://patchblox.com/security/data/cve/CVE-2020-0683.md) | Patch now | Windows Installer | 7.0 | 0.0767 | CISA KEV, Disclosed | | [CVE-2020-0729](https://patchblox.com/security/data/cve/CVE-2020-0729.md) | Urgent | Windows Shell | 7.5 | 0.3086 | | | [CVE-2020-0734](https://patchblox.com/security/data/cve/CVE-2020-0734.md) | Urgent | Remote Desktop Client | 7.5 | 0.1653 | More likely | | [CVE-2020-0662](https://patchblox.com/security/data/cve/CVE-2020-0662.md) | Urgent | Windows Hyper-V | 8.6 | 0.1325 | | | [CVE-2020-0681](https://patchblox.com/security/data/cve/CVE-2020-0681.md) | Urgent | Microsoft Windows | 7.5 | 0.1063 | More likely | | [CVE-2020-0673](https://patchblox.com/security/data/cve/CVE-2020-0673.md) | Urgent | Internet Explorer | 6.4 | 0.0985 | More likely | | [CVE-2020-0738](https://patchblox.com/security/data/cve/CVE-2020-0738.md) | Urgent | Windows Media | 8.8 | 0.0615 | | | [CVE-2020-0658](https://patchblox.com/security/data/cve/CVE-2020-0658.md) | Urgent | Microsoft Windows | 5.5 | 0.0145 | More likely | | [CVE-2020-0731](https://patchblox.com/security/data/cve/CVE-2020-0731.md) | Urgent | Windows Kernel | 7.0 | 0.0106 | More likely | | [CVE-2020-0715](https://patchblox.com/security/data/cve/CVE-2020-0715.md) | Urgent | Microsoft Graphics Component | 7.0 | 0.0096 | More likely | | [CVE-2020-0720](https://patchblox.com/security/data/cve/CVE-2020-0720.md) | Urgent | Windows Kernel | 7.0 | 0.0096 | More likely | | [CVE-2020-0721](https://patchblox.com/security/data/cve/CVE-2020-0721.md) | Urgent | Windows Kernel | 7.0 | 0.0096 | More likely | | [CVE-2020-0722](https://patchblox.com/security/data/cve/CVE-2020-0722.md) | Urgent | Windows Kernel | 7.0 | 0.0096 | More likely | | [CVE-2020-0723](https://patchblox.com/security/data/cve/CVE-2020-0723.md) | Urgent | Windows Kernel | 7.0 | 0.0096 | More likely | | [CVE-2020-0726](https://patchblox.com/security/data/cve/CVE-2020-0726.md) | Urgent | Windows Kernel | 7.0 | 0.0096 | More likely | | [CVE-2020-0745](https://patchblox.com/security/data/cve/CVE-2020-0745.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.0091 | More likely | | [CVE-2020-0725](https://patchblox.com/security/data/cve/CVE-2020-0725.md) | Urgent | Windows Kernel | 7.0 | 0.0091 | More likely | | [CVE-2020-0657](https://patchblox.com/security/data/cve/CVE-2020-0657.md) | Urgent | Microsoft Windows | 7.8 | 0.0085 | More likely | | [CVE-2020-0817](https://patchblox.com/security/data/cve/CVE-2020-0817.md) | Urgent | Remote Desktop Client | 7.5 | n/a | More likely | | [CVE-2020-0655](https://patchblox.com/security/data/cve/CVE-2020-0655.md) | High | Windows Shell | 8.0 | 0.6569 | | | [CVE-2020-0668](https://patchblox.com/security/data/cve/CVE-2020-0668.md) | High | Microsoft Windows | 7.8 | 0.2605 | | | [CVE-2020-0708](https://patchblox.com/security/data/cve/CVE-2020-0708.md) | High | Windows Update Stack | 7.8 | 0.1351 | | | [CVE-2020-0660](https://patchblox.com/security/data/cve/CVE-2020-0660.md) | High | Windows RDP | 7.5 | 0.0539 | | | [CVE-2020-0753](https://patchblox.com/security/data/cve/CVE-2020-0753.md) | High | Microsoft Windows | 7.8 | 0.0231 | | | [CVE-2020-0754](https://patchblox.com/security/data/cve/CVE-2020-0754.md) | High | Microsoft Windows | 7.8 | 0.0148 | | | [CVE-2020-0686](https://patchblox.com/security/data/cve/CVE-2020-0686.md) | High | Windows Installer | 7.0 | 0.0096 | Disclosed | | [CVE-2020-0707](https://patchblox.com/security/data/cve/CVE-2020-0707.md) | High | Windows Shell | 7.8 | 0.0095 | | | [CVE-2020-0678](https://patchblox.com/security/data/cve/CVE-2020-0678.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-0682](https://patchblox.com/security/data/cve/CVE-2020-0682.md) | High | Microsoft Windows | 7.8 | 0.0091 | | | [CVE-2020-0719](https://patchblox.com/security/data/cve/CVE-2020-0719.md) | High | Windows Kernel | 7.0 | 0.0091 | | | [CVE-2020-0724](https://patchblox.com/security/data/cve/CVE-2020-0724.md) | High | Windows Kernel | 7.0 | 0.0091 | | | [CVE-2020-0666](https://patchblox.com/security/data/cve/CVE-2020-0666.md) | High | Microsoft Windows | 7.8 | 0.0085 | | | [CVE-2020-0679](https://patchblox.com/security/data/cve/CVE-2020-0679.md) | High | Microsoft Windows | 7.8 | 0.0085 | | | [CVE-2020-0680](https://patchblox.com/security/data/cve/CVE-2020-0680.md) | High | Microsoft Windows | 7.8 | 0.0085 | | | [CVE-2020-0667](https://patchblox.com/security/data/cve/CVE-2020-0667.md) | High | Microsoft Windows | 7.8 | 0.0079 | | | [CVE-2020-0735](https://patchblox.com/security/data/cve/CVE-2020-0735.md) | High | Microsoft Windows Search Component | 7.8 | 0.0079 | | | [CVE-2020-0737](https://patchblox.com/security/data/cve/CVE-2020-0737.md) | High | Microsoft Windows | 7.8 | 0.0079 | | | [CVE-2020-0752](https://patchblox.com/security/data/cve/CVE-2020-0752.md) | High | Windows COM | 7.8 | 0.0079 | | | [CVE-2020-0818](https://patchblox.com/security/data/cve/CVE-2020-0818.md) | High | Microsoft Windows | 7.8 | n/a | | | [CVE-2020-0706](https://patchblox.com/security/data/cve/CVE-2020-0706.md) | Routine | Microsoft Edge (HTML-based) | 4.3 | 0.0507 | Disclosed | | [CVE-2020-0665](https://patchblox.com/security/data/cve/CVE-2020-0665.md) | Routine | Windows Authentication Methods | 6.6 | 0.0438 | | | [CVE-2020-0744](https://patchblox.com/security/data/cve/CVE-2020-0744.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0193 | | | [CVE-2020-0675](https://patchblox.com/security/data/cve/CVE-2020-0675.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0676](https://patchblox.com/security/data/cve/CVE-2020-0676.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0677](https://patchblox.com/security/data/cve/CVE-2020-0677.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0748](https://patchblox.com/security/data/cve/CVE-2020-0748.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0755](https://patchblox.com/security/data/cve/CVE-2020-0755.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0756](https://patchblox.com/security/data/cve/CVE-2020-0756.md) | Routine | Microsoft Windows | 5.5 | 0.0161 | | | [CVE-2020-0698](https://patchblox.com/security/data/cve/CVE-2020-0698.md) | Routine | Microsoft Windows | 5.5 | 0.0145 | | | [CVE-2020-0705](https://patchblox.com/security/data/cve/CVE-2020-0705.md) | Routine | Windows NDIS | 5.5 | 0.0145 | | | [CVE-2020-0716](https://patchblox.com/security/data/cve/CVE-2020-0716.md) | Routine | Windows Kernel | 5.5 | 0.0145 | | | [CVE-2020-0691](https://patchblox.com/security/data/cve/CVE-2020-0691.md) | Routine | Windows Kernel-Mode Drivers | 4.7 | 0.0096 | | | [CVE-2020-0730](https://patchblox.com/security/data/cve/CVE-2020-0730.md) | Routine | Windows Shell | 6.3 | 0.0090 | | --- 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