# CVE-2018-8332: Win32k Graphics Remote Code Execution Vulnerability

CVE-2018-8332 is fixed in 31 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2018-8332
- Priority: Urgent
- CVSS: 8.8 (Critical)
- EPSS: 0.1907
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Sep 11, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8332

## Description

<p>A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted embedded fonts. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>There are multiple ways an attacker could exploit this vulnerability.</p> <ul> <li><p>In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit this vulnerability and then convince a user to view the website. An attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by getting them to click a link in an email message or in an Instant Messenger message that takes users to the attacker's website, or by opening an attachment sent through email.</p> </li> <li><p>In a file sharing attack scenario, an attacker could provide a specially crafted document file that is designed to exploit this vulnerability, and then convince a user to open the document file.</p> </li> </ul> <p>The security update addresses the vulnerability by correcting how the Windows font library handles embedded fonts.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1607 for 32-bit Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1607 for x64-based Systems | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.1324 | [KB4457138](https://patchblox.com/security/data/fix/microsoft/kb4457138.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1709 for 32-bit Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1709 for x64-based Systems | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1803 for 32-bit Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 |
| Microsoft | Windows 10 Version 1803 for x64-based Systems | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17976 | [KB4457132](https://patchblox.com/security/data/fix/microsoft/kb4457132.md) | Sep 11, 2018 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows RT 8.1 |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4457144](https://patchblox.com/security/data/fix/microsoft/kb4457144.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB4457145](https://patchblox.com/security/data/fix/microsoft/kb4457145.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 |  | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 |  | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB4457984](https://patchblox.com/security/data/fix/microsoft/kb4457984.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB4458010](https://patchblox.com/security/data/fix/microsoft/kb4458010.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 |  | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4457135](https://patchblox.com/security/data/fix/microsoft/kb4457135.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB4457140](https://patchblox.com/security/data/fix/microsoft/kb4457140.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4457129](https://patchblox.com/security/data/fix/microsoft/kb4457129.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB4457143](https://patchblox.com/security/data/fix/microsoft/kb4457143.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2016 | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 |
| Microsoft | Windows Server 2016 (Server Core installation) | 14393.2485 | [KB4457131](https://patchblox.com/security/data/fix/microsoft/kb4457131.md) | Sep 11, 2018 |
| Microsoft | Windows Server, version 1709  (Server Core Installation) | 16299.665 | [KB4457142](https://patchblox.com/security/data/fix/microsoft/kb4457142.md) | Sep 11, 2018 |
| Microsoft | Windows Server, version 1803  (Server Core Installation) | 17134.285 | [KB4457128](https://patchblox.com/security/data/fix/microsoft/kb4457128.md) | Sep 11, 2018 |

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Data as of 2026-11-07T12:40:37Z 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