# CVE-2016-3236: Windows WPAD Proxy Discovery Elevation of Privilege Vulnerability

CVE-2016-3236 is fixed in 23 products on 1 platform, first by KB3163018, released June 14, 2016. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2016-3236
- Priority: Urgent
- CVSS: n/a (Important)
- EPSS: 0.7561
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: yes
- Vendor exploitability assessment: Exploitation More Likely
- Published: Jun 14, 2016
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3236

## Description

<p>An elevation of privilege vulnerability exists when Microsoft Windows improperly handles certain proxy discovery scenarios using the Web Proxy Auto Discovery (WPAD) protocol method.</p> <p>An attacker who successfully exploited the vulnerability could potentially access and control network traffic for which the attacker does not have sufficient privileges.</p> <p>The update addresses the vulnerability by correcting WPAD automatic proxy detection in Windows.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 |
| Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.420 | [KB3163018](https://patchblox.com/security/data/fix/microsoft/kb3163018.md) | Jun 14, 2016 |
| Microsoft | Windows 10 for 32-bit Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 2016 |
| Microsoft | Windows 10 for x64-based Systems | 10240.16942 | [KB3163017](https://patchblox.com/security/data/fix/microsoft/kb3163017.md) | Jun 14, 2016 |
| Microsoft | Windows 7 for 32-bit Systems Service Pack 1 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows 7 for x64-based Systems Service Pack 1 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows 8.1 for 32-bit systems |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows 8.1 for x64-based systems |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows RT 8.1 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2012 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2012 (Server Core installation) |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2012 R2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Vista Service Pack 2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |
| Microsoft | Windows Vista x64 Edition Service Pack 2 |  | [KB3161949](https://patchblox.com/security/data/fix/microsoft/kb3161949.md) | Jun 14, 2016 |

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