# KB4343899: August 2018 security update

KB4343899, released August 14, 2018, fixes 15 CVEs across 8 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/kb4343899
- Platform: Microsoft
- Released: Aug 14, 2018
- Priority: Urgent (Closes CVE-2018-8397, rated Critical)
- CVEs: 15, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://support.microsoft.com/help/4343899

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [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 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) |  |  |
| [Windows 7 for 32-bit Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/windows-7-for-32-bit-systems-service-pack-1.md) |  |  |
| [Windows 7 for x64-based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/windows-7-for-x64-based-systems-service-pack-1.md) |  |  |
| [Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/windows-server-2008-r2-for-itanium-based-systems-service-pack-1.md) |  |  |
| [Windows Server 2008 R2 for x64-based Systems Service Pack 1](https://patchblox.com/security/data/product/microsoft/windows-server-2008-r2-for-x64-based-systems-service-pack-1.md) |  |  |
| [Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)](https://patchblox.com/security/data/product/microsoft/windows-server-2008-r2-for-x64-based-systems-service-pack-1-server-core-installation.md) |  |  |

## CVEs this fix closes

| CVE | Priority | Component | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2018-8397](https://patchblox.com/security/data/cve/CVE-2018-8397.md) | Urgent | Microsoft Graphics Component | 8.8 | 0.6752 |  |
| [CVE-2018-8344](https://patchblox.com/security/data/cve/CVE-2018-8344.md) | Urgent | Microsoft Graphics Component | 7.8 | 0.2298 | More likely |
| [CVE-2018-8345](https://patchblox.com/security/data/cve/CVE-2018-8345.md) | Urgent | Microsoft Windows | 7.5 | 0.1490 | More likely |
| [CVE-2018-8404](https://patchblox.com/security/data/cve/CVE-2018-8404.md) | Urgent | Windows Kernel | 7.0 | 0.0122 | More likely |
| [CVE-2018-8349](https://patchblox.com/security/data/cve/CVE-2018-8349.md) | High | Windows COM | 7.0 | 0.2340 |  |
| [CVE-2018-8346](https://patchblox.com/security/data/cve/CVE-2018-8346.md) | High | Microsoft Windows | 7.5 | 0.1997 |  |
| [CVE-2018-8342](https://patchblox.com/security/data/cve/CVE-2018-8342.md) | High | Windows RNDIS | 7.0 | 0.0129 |  |
| [CVE-2018-8343](https://patchblox.com/security/data/cve/CVE-2018-8343.md) | High | Windows NDIS | 7.0 | 0.0129 |  |
| [CVE-2018-8339](https://patchblox.com/security/data/cve/CVE-2018-8339.md) | High | Windows Installer | 7.4 | 0.0116 |  |
| [CVE-2018-8316](https://patchblox.com/security/data/cve/CVE-2018-8316.md) | Routine | Internet Explorer | 6.4 | 0.1450 |  |
| [CVE-2018-8394](https://patchblox.com/security/data/cve/CVE-2018-8394.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0851 |  |
| [CVE-2018-8398](https://patchblox.com/security/data/cve/CVE-2018-8398.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0851 |  |
| [CVE-2018-8341](https://patchblox.com/security/data/cve/CVE-2018-8341.md) | Routine | Windows Kernel | 4.7 | 0.0285 |  |
| [CVE-2018-8396](https://patchblox.com/security/data/cve/CVE-2018-8396.md) | Routine | Microsoft Graphics Component | 4.7 | 0.0264 |  |
| [CVE-2018-8348](https://patchblox.com/security/data/cve/CVE-2018-8348.md) | Routine | Windows Kernel | 4.7 | 0.0235 |  |

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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