# CVE-2017-8663: Microsoft Office Remote Code Execution Vulnerability

CVE-2017-8663 is fixed in 8 products on 1 platform, first by KB3213643, released July 27, 2017. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-8663
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.2008
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jul 27, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-8663

## Description

<p>A remote code execution vulnerability exists in the way that Microsoft Offiice parses specially crafted email messages. An attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>Exploitation of this vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Offiice. In an email attack scenario, an attacker could exploit the vulnerability by sending a specially crafted file to the user and then convincing the user to open the file.</p> <p>The security update addresses the vulnerability by correcting the way that Microsoft Offiice parses specially crafted email messages.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Outlook 2007 Service Pack 3 |  | [KB3213643](https://patchblox.com/security/data/fix/microsoft/kb3213643.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (32-bit editions) |  | [KB2956078](https://patchblox.com/security/data/fix/microsoft/kb2956078.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (64-bit editions) |  | [KB2956078](https://patchblox.com/security/data/fix/microsoft/kb2956078.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2013 RT Service Pack 1 |  | [KB4011078](https://patchblox.com/security/data/fix/microsoft/kb4011078.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (32-bit editions) |  | [KB4011078](https://patchblox.com/security/data/fix/microsoft/kb4011078.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (64-bit editions) |  | [KB4011078](https://patchblox.com/security/data/fix/microsoft/kb4011078.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2016 (32-bit edition) |  | [KB4011052](https://patchblox.com/security/data/fix/microsoft/kb4011052.md) | Jul 27, 2017 |
| Microsoft | Microsoft Outlook 2016 (64-bit edition) |  | [KB4011052](https://patchblox.com/security/data/fix/microsoft/kb4011052.md) | Jul 27, 2017 |

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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