# KB4457426: September 2018 security update

KB4457426, released September 11, 2018, fixes 5 CVEs across 9 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/kb4457426
- Platform: Microsoft
- Released: Sep 11, 2018
- Priority: Urgent (Closes CVE-2018-8457, exploitation more likely)
- CVEs: 5, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4457426

## 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-2018-8457](https://patchblox.com/security/data/cve/CVE-2018-8457.md) | Urgent | Microsoft Scripting Engine | 4.2 | 0.1308 | Disclosed |
| [CVE-2018-8447](https://patchblox.com/security/data/cve/CVE-2018-8447.md) | Urgent | Internet Explorer | 6.4 | 0.1290 | More likely |
| [CVE-2018-8452](https://patchblox.com/security/data/cve/CVE-2018-8452.md) | Urgent | Microsoft Scripting Engine | 4.3 | 0.0559 | More likely |
| [CVE-2018-8470](https://patchblox.com/security/data/cve/CVE-2018-8470.md) | Urgent | Internet Explorer | 4.3 | 0.0327 | More likely |
| [CVE-2018-8315](https://patchblox.com/security/data/cve/CVE-2018-8315.md) | Routine | Microsoft Scripting Engine | 4.2 | 0.0318 |  |

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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