# CVE-2017-8506: Microsoft Outlook Remote Code Execution Vulnerability

CVE-2017-8506 is fixed in 6 products on 1 platform, first by KB3203467, released June 13, 2017. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-8506
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.2417
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Jun 13, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-8506

## Description

<p>A remote code execution vulnerability exists when Microsoft Outlook improperly validates input before loading dynamic link library (DLL) files. An attacker who successfully exploited this 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. 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>To exploit the vulnerability, an attacker must first convince a user to open a specially crafted Outlook document.</p> <p>The updates address the vulnerability by correcting how Outlook validates input before loading DLL files.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (32-bit editions) |  | [KB3203467](https://patchblox.com/security/data/fix/microsoft/kb3203467.md) | Jun 13, 2017 |
| Microsoft | Microsoft Outlook 2010 Service Pack 2 (64-bit editions) |  | [KB3203467](https://patchblox.com/security/data/fix/microsoft/kb3203467.md) | Jun 13, 2017 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (32-bit editions) |  | [KB3191938](https://patchblox.com/security/data/fix/microsoft/kb3191938.md) | Jun 13, 2017 |
| Microsoft | Microsoft Outlook 2013 Service Pack 1 (64-bit editions) |  | [KB3191938](https://patchblox.com/security/data/fix/microsoft/kb3191938.md) | Jun 13, 2017 |
| Microsoft | Microsoft Outlook 2016 (32-bit edition) |  | [KB3191932](https://patchblox.com/security/data/fix/microsoft/kb3191932.md) | Jun 13, 2017 |
| Microsoft | Microsoft Outlook 2016 (64-bit edition) |  | [KB3191932](https://patchblox.com/security/data/fix/microsoft/kb3191932.md) | Jun 13, 2017 |

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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

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