# KB4592449: December 2020 cumulative update for Windows 10 1903 KB4592449, released December 8, 2020, fixes 21 CVEs across 14 products. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb4592449 - Platform: Microsoft - Released: Dec 8, 2020 - Priority: Urgent (Closes CVE-2020-17096, exploitation more likely) - CVEs: 21, exploited: 0, on CISA KEV: 0 - Vendor advisory: https://support.microsoft.com/help/4592449 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1903-for-32-bit-systems.md) | | | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1903-for-arm64-based-systems.md) | | | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1903-for-x64-based-systems.md) | | | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1909-for-32-bit-systems.md) | | | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1909-for-arm64-based-systems.md) | | | | [Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/microsoft-edge-edgehtml-based-on-windows-10-version-1909-for-x64-based-systems.md) | | | | [Windows 10 Version 1903 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1903-for-32-bit-systems.md) | | | | [Windows 10 Version 1903 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1903-for-arm64-based-systems.md) | | | | [Windows 10 Version 1903 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1903-for-x64-based-systems.md) | | | | [Windows 10 Version 1909 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1909-for-32-bit-systems.md) | | | | [Windows 10 Version 1909 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1909-for-arm64-based-systems.md) | | | | [Windows 10 Version 1909 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-1909-for-x64-based-systems.md) | | | | [Windows Server, version 1903 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1903-server-core-installation.md) | | | | [Windows Server, version 1909 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-1909-server-core-installation.md) | | | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2020-17096](https://patchblox.com/security/data/cve/CVE-2020-17096.md) | Urgent | Windows SMB | 7.5 | 0.1954 | More likely | | [CVE-2020-17095](https://patchblox.com/security/data/cve/CVE-2020-17095.md) | Urgent | Windows Hyper-V | 8.5 | 0.0503 | | | [CVE-2020-17131](https://patchblox.com/security/data/cve/CVE-2020-17131.md) | Urgent | Microsoft Edge (HTML-based) | 4.2 | 0.0205 | | | [CVE-2020-17103](https://patchblox.com/security/data/cve/CVE-2020-17103.md) | High | Microsoft Windows | 7.0 | 0.2384 | | | [CVE-2020-17140](https://patchblox.com/security/data/cve/CVE-2020-17140.md) | High | Windows SMB | 8.1 | 0.1535 | | | [CVE-2020-17136](https://patchblox.com/security/data/cve/CVE-2020-17136.md) | High | Microsoft Windows | 7.8 | 0.1385 | | | [CVE-2020-17049](https://patchblox.com/security/data/cve/CVE-2020-17049.md) | High | Microsoft Windows | 7.2 | 0.1379 | | | [CVE-2020-16960](https://patchblox.com/security/data/cve/CVE-2020-16960.md) | High | Windows Backup Engine | 7.8 | 0.0127 | | | [CVE-2020-16961](https://patchblox.com/security/data/cve/CVE-2020-16961.md) | High | Windows Backup Engine | 7.8 | 0.0127 | | | [CVE-2020-17134](https://patchblox.com/security/data/cve/CVE-2020-17134.md) | High | Microsoft Windows | 7.8 | 0.0121 | | | [CVE-2020-16958](https://patchblox.com/security/data/cve/CVE-2020-16958.md) | High | Windows Backup Engine | 7.8 | 0.0114 | | | [CVE-2020-16959](https://patchblox.com/security/data/cve/CVE-2020-16959.md) | High | Windows Backup Engine | 7.8 | 0.0114 | | | [CVE-2020-16962](https://patchblox.com/security/data/cve/CVE-2020-16962.md) | High | Windows Backup Engine | 7.8 | 0.0114 | | | [CVE-2020-16963](https://patchblox.com/security/data/cve/CVE-2020-16963.md) | High | Windows Backup Engine | 7.8 | 0.0114 | | | [CVE-2020-16964](https://patchblox.com/security/data/cve/CVE-2020-16964.md) | High | Windows Backup Engine | 7.8 | 0.0114 | | | [CVE-2020-17092](https://patchblox.com/security/data/cve/CVE-2020-17092.md) | High | Microsoft Windows | 7.8 | 0.0104 | | | [CVE-2020-17139](https://patchblox.com/security/data/cve/CVE-2020-17139.md) | High | Microsoft Windows | 7.8 | 0.0092 | | | [CVE-2020-16996](https://patchblox.com/security/data/cve/CVE-2020-16996.md) | Routine | Microsoft Windows | 6.5 | 0.0237 | | | [CVE-2020-17094](https://patchblox.com/security/data/cve/CVE-2020-17094.md) | Routine | Windows Error Reporting | 5.5 | 0.0140 | | | [CVE-2020-17098](https://patchblox.com/security/data/cve/CVE-2020-17098.md) | Routine | Microsoft Graphics Component | 5.5 | 0.0140 | | | [CVE-2020-17097](https://patchblox.com/security/data/cve/CVE-2020-17097.md) | Routine | Windows Media | 3.3 | 0.0105 | | --- Data as of 2026-11-07T18:46:35Z UTC. 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