# CVE-2016-3379: Microsoft Exchange Elevation of Privilege Vulnerability

CVE-2016-3379 is fixed in 2 products on 1 platform, first by KB3184736, released September 13, 2016. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2016-3379
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.0823
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Sep 13, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3379

## Description

<p>An elevation of privilege vulnerability exists in the way that Microsoft Outlook handles meeting invitation requests.</p> <p>To exploit the vulnerability, an attacker could send a specially crafted Outlook meeting invitation request with malicious cross-site scripting (XSS) capability to a user.</p> <p>The update addresses the vulnerability by correcting how Outlook handles meeting invitation requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| 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 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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