Microsoft Office
CVE-2018-8430 — Word PDF Remote Code Execution Vulnerability
Executive Summary
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. To exploit the vulnerability, an attacker must entice the user to open a specially crafted PDF file. The update addresses the vulnerability by modifying how Microsoft Word parses PDF files.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
EPSS Score
0.23044
probability of exploitation in the next 30 days
0.97554 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
7 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Office 2016 Click-to-Run (C2R) for 32-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Office 2016 Click-to-Run (C2R) for 64-bit editions | Click to Run (Security Update) |
Important | Remote Code Execution | No |
| Microsoft Word 2013 RT Service Pack 1 | 4032246 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Word 2013 Service Pack 1 (32-bit editions) | 4032246 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Word 2013 Service Pack 1 (64-bit editions) | 4032246 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Word 2016 (32-bit edition) | 4092447 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Word 2016 (64-bit edition) | 4092447 (Security Update) |
Important | Remote Code Execution | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
4032246 |
Security Update | Maybe |
4092447 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Omri Herscovici of Check Point
References
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