# CVE-2016-3312: Universal Outlook Information Disclosure Vulnerability

CVE-2016-3312 is fixed in 4 products on 1 platform, first by KB3176493, released August 9, 2016. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2016-3312
- Priority: Routine
- CVSS: 4.3 (Important)
- EPSS: 0.0965
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Aug 9, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3312

## Description

<p>An information disclosure vulnerability exists when Universal Outlook fails to establish a secure connection. An attacker could use this vulnerability to obtain the username and password of a user.</p> <p>The update addresses the vulnerability by preventing Universal Outlook from disclosing usernames and passwords.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.545 | [KB3176493](https://patchblox.com/security/data/fix/microsoft/kb3176493.md) | Aug 9, 2016 |
| Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.545 | [KB3176493](https://patchblox.com/security/data/fix/microsoft/kb3176493.md) | Aug 9, 2016 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.17071 | [KB3176492](https://patchblox.com/security/data/fix/microsoft/kb3176492.md) | Aug 9, 2016 |
| Microsoft | Windows 10 for x64-based Systems | 10240.17071 | [KB3176492](https://patchblox.com/security/data/fix/microsoft/kb3176492.md) | Aug 9, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo