# KB4018271: May 2017 security update

KB4018271, released May 9, 2017, fixes 5 CVEs across 9 products. One of them is being exploited (CVE-2017-0222); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/microsoft/kb4018271
- Platform: Microsoft
- Released: May 9, 2017
- Priority: Patch now (Closes CVE-2017-0222, exploited (CISA KEV))
- CVEs: 5, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/4018271

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Internet Explorer 10 on Windows Server 2012](https://patchblox.com/security/data/product/microsoft/internet-explorer-10-on-windows-server-2012.md) |  |  |
| [Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-7-for-32-bit-systems-service-pack-1.md) |  |  |
| [Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-7-for-x64-based-systems-service-pack-1.md) |  |  |
| [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 Server 2008 R2 for x64-based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/internet-explorer-11-on-windows-server-2008-r2-for-x64-based-systems-service-pack-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) |  |  |
| [Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/internet-explorer-9-on-windows-server-2008-for-32-bit-systems-service-pack-2.md) |  |  |
| [Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2](https://patchblox.com/security/data/product/microsoft/internet-explorer-9-on-windows-server-2008-for-x64-based-systems-service-pack-2.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2017-0222](https://patchblox.com/security/data/cve/CVE-2017-0222.md) | Patch now | Internet Explorer | 6.0 | 0.2965 | CISA KEV |
| [CVE-2017-0238](https://patchblox.com/security/data/cve/CVE-2017-0238.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1807 | More likely |
| [CVE-2017-0226](https://patchblox.com/security/data/cve/CVE-2017-0226.md) | Urgent | Internet Explorer | 7.5 | 0.0982 | More likely |
| [CVE-2017-0064](https://patchblox.com/security/data/cve/CVE-2017-0064.md) | Routine | Internet Explorer | 2.4 | 0.0520 | Disclosed |
| [CVE-2017-0231](https://patchblox.com/security/data/cve/CVE-2017-0231.md) | Routine | Microsoft Edge | 4.3 | 0.0367 | Disclosed |

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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