# KB4457143: September 2018 security update

KB4457143, released September 11, 2018, fixes 20 CVEs across 4 products. One of them is being exploited (CVE-2018-8440); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/microsoft/kb4457143
- Platform: Microsoft
- Released: Sep 11, 2018
- Priority: Patch now (Closes CVE-2018-8440, exploited (CISA KEV, ransomware))
- CVEs: 20, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://support.microsoft.com/help/4457143

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [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 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-2018-8440](https://patchblox.com/security/data/cve/CVE-2018-8440.md) | Patch now | Microsoft Windows | 7.8 | 0.1853 | CISA KEV, Ransomware, Disclosed |
| [CVE-2018-8420](https://patchblox.com/security/data/cve/CVE-2018-8420.md) | Urgent | Microsoft XML Core Services | 7.5 | 0.4890 | More likely |
| [CVE-2018-8332](https://patchblox.com/security/data/cve/CVE-2018-8332.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1907 |  |
| [CVE-2018-8475](https://patchblox.com/security/data/cve/CVE-2018-8475.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.1586 | Disclosed |
| [CVE-2018-8468](https://patchblox.com/security/data/cve/CVE-2018-8468.md) | Urgent | Windows Shell | 4.3 | 0.1177 | More likely |
| [CVE-2018-8439](https://patchblox.com/security/data/cve/CVE-2018-8439.md) | Urgent | Windows Hyper-V | 7.6 | 0.0431 |  |
| [CVE-2018-8410](https://patchblox.com/security/data/cve/CVE-2018-8410.md) | Urgent | Microsoft Windows | 7.0 | 0.0398 | More likely |
| [CVE-2018-8442](https://patchblox.com/security/data/cve/CVE-2018-8442.md) | Urgent | Windows Kernel | 4.7 | 0.0278 | More likely |
| [CVE-2018-8392](https://patchblox.com/security/data/cve/CVE-2018-8392.md) | High | Microsoft JET Database Engine | 7.8 | 0.2276 |  |
| [CVE-2018-8393](https://patchblox.com/security/data/cve/CVE-2018-8393.md) | High | Microsoft JET Database Engine | 7.8 | 0.2248 |  |
| [CVE-2018-8444](https://patchblox.com/security/data/cve/CVE-2018-8444.md) | High | Windows SMB Server | 7.0 | 0.0586 |  |
| [CVE-2018-8424](https://patchblox.com/security/data/cve/CVE-2018-8424.md) | Routine | Microsoft Graphics Component | 4.7 | 0.1299 |  |
| [CVE-2018-8335](https://patchblox.com/security/data/cve/CVE-2018-8335.md) | Routine | Windows SMB Server | 4.8 | 0.0900 |  |
| [CVE-2018-8438](https://patchblox.com/security/data/cve/CVE-2018-8438.md) | Routine | Microsoft Windows | 5.8 | 0.0717 |  |
| [CVE-2018-8434](https://patchblox.com/security/data/cve/CVE-2018-8434.md) | Routine | Windows Hyper-V | 5.4 | 0.0349 |  |
| [CVE-2018-8443](https://patchblox.com/security/data/cve/CVE-2018-8443.md) | Routine | Windows Kernel | 4.7 | 0.0278 |  |
| [CVE-2018-8446](https://patchblox.com/security/data/cve/CVE-2018-8446.md) | Routine | Windows Kernel | 4.7 | 0.0278 |  |
| [CVE-2018-8271](https://patchblox.com/security/data/cve/CVE-2018-8271.md) | Routine | Microsoft Windows | 2.5 | 0.0278 |  |
| [CVE-2018-8433](https://patchblox.com/security/data/cve/CVE-2018-8433.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0263 |  |
| [CVE-2018-8419](https://patchblox.com/security/data/cve/CVE-2018-8419.md) | Routine | Windows Media | 4.7 | 0.0168 |  |

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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