# CVE-2016-0138: Microsoft Outlook Information Disclosure Vulnerability

CVE-2016-0138 is fixed in 7 products on 1 platform, first by KB3184711, released September 13, 2016. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2016-0138
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.1346
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Sep 13, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-0138

## Description

<p>An information disclosure vulnerability exists in the way that Microsoft Exchange Server parses email messages. The vulnerability could allow an attacker to discover confidential user information that is contained in Microsoft Outlook applications.</p> <p>To exploit the vulnerability, an attacker could use "send as" rights to send a specially crafted message to a user.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Exchange parses certain unstructured file formats.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2007 Service Pack 3 |  | [KB3184711](https://patchblox.com/security/data/fix/microsoft/kb3184711.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2010 Service Pack 3 |  | [KB3184728](https://patchblox.com/security/data/fix/microsoft/kb3184728.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 12 |  | [KB3184736](https://patchblox.com/security/data/fix/microsoft/kb3184736.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 13 |  | [KB3184736](https://patchblox.com/security/data/fix/microsoft/kb3184736.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2013 Service Pack 1 |  | [KB3184736](https://patchblox.com/security/data/fix/microsoft/kb3184736.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 1 |  | [KB3184736](https://patchblox.com/security/data/fix/microsoft/kb3184736.md) | Sep 13, 2016 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 2 |  | [KB3184736](https://patchblox.com/security/data/fix/microsoft/kb3184736.md) | Sep 13, 2016 |

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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