# CVE-2016-3198: Microsoft Edge Security Feature Bypass Vulnerability

CVE-2016-3198 is fixed in 4 products on 1 platform, first by KB3163018, released June 14, 2016. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2016-3198
- Priority: High
- CVSS: n/a (Important)
- EPSS: 0.3248
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Unlikely
- Published: Jun 14, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3198

## Description

<p>A security feature bypass vulnerability exists in Microsoft Edge when the Edge <a href="https://technet.microsoft.com/en-us/library/security/dn848375.aspx#CSP">Content Security Policy (CSP)</a> fails to properly validate certain specially crafted documents. An attacker who exploited the bypass could trick a user into loading a page containing malicious content.</p> <p>To exploit the bypass, an attacker must trick a user into either loading a page containing malicious content or visiting a malicious website. The attacker could also inject the malicious page into either a compromised website or an advertisement network.</p> <p>The security update addresses the bypass by correcting how the Edge CSP validates documents.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for 32-bit Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for x64-based Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 2016 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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