# CVE-2016-3305: Windows Session Object Elevation of Privilege Vulnerability CVE-2016-3305 is fixed in 27 products on 1 platform, first by KB3185614, released September 13, 2016. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2016-3305 - Priority: High - CVSS: 7.8 (Important) - EPSS: 0.0146 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Jul 11, 2017 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3305 ## Description

An elevation of privilege vulnerability exists in the way that Windows handles session objects. A locally authenticated attacker who successfully exploited the vulnerability could hijack the session of another user.

To exploit the vulnerability, the attacker could run a specially crafted application.

The security update corrects how Windows handles session objects to prevent user session hijacking.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Windows 10 Version 1511 for 32-bit Systems | 10586.589 | [KB3185614](https://patchblox.com/security/data/fix/microsoft/kb3185614.md) | Sep 13, 2016 | | Microsoft | Windows 10 Version 1511 for x64-based Systems | 10586.589 | [KB3185614](https://patchblox.com/security/data/fix/microsoft/kb3185614.md) | Sep 13, 2016 | | Microsoft | Windows 10 Version 1607 for 32-bit Systems | | [KB3189866](https://patchblox.com/security/data/fix/microsoft/kb3189866.md) | Sep 13, 2016 | | Microsoft | Windows 10 Version 1607 for x64-based Systems | | [KB3189866](https://patchblox.com/security/data/fix/microsoft/kb3189866.md) | Sep 13, 2016 | | Microsoft | Windows 10 Version 1703 for 32-bit Systems | 15063.483 | [KB4025342](https://patchblox.com/security/data/fix/microsoft/kb4025342.md) | Jul 11, 2017 | | Microsoft | Windows 10 Version 1703 for x64-based Systems | 15063.483 | [KB4025342](https://patchblox.com/security/data/fix/microsoft/kb4025342.md) | Jul 11, 2017 | | Microsoft | Windows 10 for 32-bit Systems | 10240.17113 | [KB3185611](https://patchblox.com/security/data/fix/microsoft/kb3185611.md) | Sep 13, 2016 | | Microsoft | Windows 10 for x64-based Systems | 10240.17113 | [KB3185611](https://patchblox.com/security/data/fix/microsoft/kb3185611.md) | Sep 13, 2016 | | Microsoft | Windows 7 for 32-bit Systems Service Pack 1 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows 7 for x64-based Systems Service Pack 1 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows 8.1 for 32-bit systems | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows 8.1 for x64-based systems | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows RT 8.1 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 for Itanium-Based Systems Service Pack 2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2012 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2012 (Server Core installation) | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2012 R2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Server 2012 R2 (Server Core installation) | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Vista Service Pack 2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | | Microsoft | Windows Vista x64 Edition Service Pack 2 | | [KB3175024](https://patchblox.com/security/data/fix/microsoft/kb3175024.md) | Sep 13, 2016 | --- 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