# CVE-2017-11776: Microsoft Outlook Information Disclosure Vulnerability

CVE-2017-11776 is fixed in 2 products on 1 platform, first by KB4011162, released October 10, 2017. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2017-11776
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0939
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Oct 10, 2017
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2017-11776

## Description

<p>An information disclosure vulnerability exists when Microsoft Outlook fails to establish a secure connection.</p> <p>An attacker who exploited the vulnerability could use it to obtain the email content of a user.</p> <p>The security update addresses the vulnerability by preventing Outlook from disclosing user email content.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Outlook 2016 (32-bit edition) |  | [KB4011162](https://patchblox.com/security/data/fix/microsoft/kb4011162.md) | Oct 10, 2017 |
| Microsoft | Microsoft Outlook 2016 (64-bit edition) |  | [KB4011162](https://patchblox.com/security/data/fix/microsoft/kb4011162.md) | Oct 10, 2017 |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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