# CVE-2018-8430: Word PDF Remote Code Execution Vulnerability

CVE-2018-8430 is fixed in 5 products on 1 platform, first by KB4032246, released September 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2018-8430
- Priority: Urgent
- CVSS: n/a (Important)
- EPSS: 0.2304
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation More Likely
- Published: Sep 11, 2018
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2018-8430

## Description

<p>A remote code execution vulnerability exists in Microsoft Word if a user opens a specially crafted PDF file. An attacker who successfully exploited the vulnerability could cause arbitrary code to execute in the context of the current user.</p> <p>To exploit the vulnerability, an attacker must entice the user to open a specially crafted PDF file.</p> <p>The update addresses the vulnerability by modifying how Microsoft Word parses PDF files.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Word 2013 RT Service Pack 1 |  | [KB4032246](https://patchblox.com/security/data/fix/microsoft/kb4032246.md) | Sep 11, 2018 |
| Microsoft | Microsoft Word 2013 Service Pack 1 (32-bit editions) |  | [KB4032246](https://patchblox.com/security/data/fix/microsoft/kb4032246.md) | Sep 11, 2018 |
| Microsoft | Microsoft Word 2013 Service Pack 1 (64-bit editions) |  | [KB4032246](https://patchblox.com/security/data/fix/microsoft/kb4032246.md) | Sep 11, 2018 |
| Microsoft | Microsoft Word 2016 (32-bit edition) |  | [KB4092447](https://patchblox.com/security/data/fix/microsoft/kb4092447.md) | Sep 11, 2018 |
| Microsoft | Microsoft Word 2016 (64-bit edition) |  | [KB4092447](https://patchblox.com/security/data/fix/microsoft/kb4092447.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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo