# KB5003637: June 2021 cumulative update for Windows 10 2004 KB5003637, released June 8, 2021, fixes 24 CVEs across 10 products. 7 of them are being exploited (CVE-2021-1675); 7 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported. - Web page: https://patchblox.com/security/fix/microsoft/kb5003637 - Platform: Microsoft - Released: Jun 8, 2021 - Priority: Patch now (Closes CVE-2021-1675, exploited (CISA KEV, ransomware)) - CVEs: 24, exploited: 7, on CISA KEV: 7 - Vendor advisory: https://support.microsoft.com/help/5003637 ## Applies to | Product | Release | Fixed in | |---|---|---| | [Windows 10 Version 2004 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-2004-for-32-bit-systems.md) | | | | [Windows 10 Version 2004 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-2004-for-arm64-based-systems.md) | | | | [Windows 10 Version 2004 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-2004-for-x64-based-systems.md) | | | | [Windows 10 Version 20H2 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-20h2-for-32-bit-systems.md) | | | | [Windows 10 Version 20H2 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-20h2-for-arm64-based-systems.md) | | | | [Windows 10 Version 21H1 for 32-bit Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h1-for-32-bit-systems.md) | | | | [Windows 10 Version 21H1 for ARM64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h1-for-arm64-based-systems.md) | | | | [Windows 10 Version 21H1 for x64-based Systems](https://patchblox.com/security/data/product/microsoft/windows-10-version-21h1-for-x64-based-systems.md) | | | | [Windows Server, version 2004 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-2004-server-core-installation.md) | | | | [Windows Server, version 20H2 (Server Core Installation)](https://patchblox.com/security/data/product/microsoft/windows-server-version-20h2-server-core-installation.md) | | | ## CVEs this fix closes | CVE | Priority | Component | CVSS | EPSS | Exploitation | |---|---|---|---:|---:|---| | [CVE-2021-1675](https://patchblox.com/security/data/cve/CVE-2021-1675.md) | Patch now | Windows Print Spooler Components | 7.8 | 0.8531 | CISA KEV, Ransomware | | [CVE-2021-31955](https://patchblox.com/security/data/cve/CVE-2021-31955.md) | Patch now | Windows Kernel | 5.5 | 0.8111 | CISA KEV | | [CVE-2021-33742](https://patchblox.com/security/data/cve/CVE-2021-33742.md) | Patch now | Windows MSHTML Platform | 7.5 | 0.5941 | CISA KEV | | [CVE-2021-31956](https://patchblox.com/security/data/cve/CVE-2021-31956.md) | Patch now | Windows NTFS | 7.8 | 0.2227 | CISA KEV | | [CVE-2021-33739](https://patchblox.com/security/data/cve/CVE-2021-33739.md) | Patch now | Windows DWM Core Library | 8.4 | 0.0661 | CISA KEV, Disclosed | | [CVE-2021-31199](https://patchblox.com/security/data/cve/CVE-2021-31199.md) | Patch now | Windows Cryptographic Services | 5.2 | 0.0298 | CISA KEV | | [CVE-2021-31201](https://patchblox.com/security/data/cve/CVE-2021-31201.md) | Patch now | Windows Cryptographic Services | 5.2 | 0.0262 | CISA KEV | | [CVE-2021-31959](https://patchblox.com/security/data/cve/CVE-2021-31959.md) | Urgent | Microsoft Scripting Engine | 6.4 | 0.0923 | More likely | | [CVE-2021-31954](https://patchblox.com/security/data/cve/CVE-2021-31954.md) | Urgent | Windows Common Log File System Driver | 7.8 | 0.0107 | More likely | | [CVE-2021-31952](https://patchblox.com/security/data/cve/CVE-2021-31952.md) | Urgent | Windows Kernel-Mode Drivers | 7.8 | 0.0081 | More likely | | [CVE-2021-31951](https://patchblox.com/security/data/cve/CVE-2021-31951.md) | Urgent | Windows Kernel | 7.8 | 0.0068 | More likely | | [CVE-2021-31974](https://patchblox.com/security/data/cve/CVE-2021-31974.md) | High | Windows Network File System | 7.5 | 0.0673 | | | [CVE-2021-31962](https://patchblox.com/security/data/cve/CVE-2021-31962.md) | High | Windows Kerberos | 9.4 | 0.0381 | | | [CVE-2021-31975](https://patchblox.com/security/data/cve/CVE-2021-31975.md) | High | Windows Network File System | 7.5 | 0.0366 | | | [CVE-2021-31976](https://patchblox.com/security/data/cve/CVE-2021-31976.md) | High | Windows Network File System | 7.5 | 0.0366 | | | [CVE-2021-31977](https://patchblox.com/security/data/cve/CVE-2021-31977.md) | High | Role: Windows Hyper-V | 8.6 | 0.0318 | | | [CVE-2021-31968](https://patchblox.com/security/data/cve/CVE-2021-31968.md) | High | Windows Remote Desktop | 7.5 | 0.0318 | Disclosed | | [CVE-2021-31958](https://patchblox.com/security/data/cve/CVE-2021-31958.md) | High | Windows NTLM | 7.5 | 0.0256 | | | [CVE-2021-31969](https://patchblox.com/security/data/cve/CVE-2021-31969.md) | High | Windows Drivers | 7.8 | 0.0122 | | | [CVE-2021-31973](https://patchblox.com/security/data/cve/CVE-2021-31973.md) | High | Windows Installer | 7.8 | 0.0055 | | | [CVE-2021-31971](https://patchblox.com/security/data/cve/CVE-2021-31971.md) | Routine | Windows HTML Platform | 6.8 | 0.0209 | | | [CVE-2021-31970](https://patchblox.com/security/data/cve/CVE-2021-31970.md) | Routine | Windows TCP/IP | 5.5 | 0.0086 | | | [CVE-2021-31960](https://patchblox.com/security/data/cve/CVE-2021-31960.md) | Routine | Windows Bind Filter Driver | 5.5 | 0.0076 | | | [CVE-2021-31972](https://patchblox.com/security/data/cve/CVE-2021-31972.md) | Routine | Windows Event Logging Service | 5.5 | 0.0076 | | --- 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