# CVE-2016-3391: Microsoft Browser Information Disclosure Vulnerability CVE-2016-3391 is fixed in 24 products on 1 platform, first by KB3192441, released October 11, 2016. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2016-3391 - Priority: Routine - CVSS: n/a (Low) - EPSS: 0.0794 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Unlikely - Published: Oct 11, 2016 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2016-3391 ## Description

An information disclosure vulnerability exists when affected Microsoft browsers leave credential data in memory. An attacker who successfully exploited this vulnerability could harvest credentials from a memory dump of the browser process. An attacker would need access to a dump of memory from the affected system.

The security update addresses the vulnerability by changing the way that Microsoft browsers store credentials in memory.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB3185332](https://patchblox.com/security/data/fix/microsoft/kb3185332.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB3192393](https://patchblox.com/security/data/fix/microsoft/kb3192393.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems | 10586.633 | [KB3192441](https://patchblox.com/security/data/fix/microsoft/kb3192441.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems | 10586.633 | [KB3192441](https://patchblox.com/security/data/fix/microsoft/kb3192441.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.321 | [KB3194798](https://patchblox.com/security/data/fix/microsoft/kb3194798.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.321 | [KB3194798](https://patchblox.com/security/data/fix/microsoft/kb3194798.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.17146 | [KB3192440](https://patchblox.com/security/data/fix/microsoft/kb3192440.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.17146 | [KB3192440](https://patchblox.com/security/data/fix/microsoft/kb3192440.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB3192391](https://patchblox.com/security/data/fix/microsoft/kb3192391.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB3185330](https://patchblox.com/security/data/fix/microsoft/kb3185330.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB3192391](https://patchblox.com/security/data/fix/microsoft/kb3192391.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB3185330](https://patchblox.com/security/data/fix/microsoft/kb3185330.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB3192392](https://patchblox.com/security/data/fix/microsoft/kb3192392.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB3185331](https://patchblox.com/security/data/fix/microsoft/kb3185331.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB3192392](https://patchblox.com/security/data/fix/microsoft/kb3192392.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB3185331](https://patchblox.com/security/data/fix/microsoft/kb3185331.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows RT 8.1 | | [KB3185331](https://patchblox.com/security/data/fix/microsoft/kb3185331.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB3192391](https://patchblox.com/security/data/fix/microsoft/kb3192391.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB3185330](https://patchblox.com/security/data/fix/microsoft/kb3185330.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB3192392](https://patchblox.com/security/data/fix/microsoft/kb3192392.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB3185331](https://patchblox.com/security/data/fix/microsoft/kb3185331.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB3191492](https://patchblox.com/security/data/fix/microsoft/kb3191492.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB3191492](https://patchblox.com/security/data/fix/microsoft/kb3191492.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 9 on Windows Vista Service Pack 2 | | [KB3191492](https://patchblox.com/security/data/fix/microsoft/kb3191492.md) | Oct 11, 2016 | | Microsoft | Internet Explorer 9 on Windows Vista x64 Edition Service Pack 2 | | [KB3191492](https://patchblox.com/security/data/fix/microsoft/kb3191492.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for 32-bit Systems | 10586.633 | [KB3192441](https://patchblox.com/security/data/fix/microsoft/kb3192441.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for x64-based Systems | 10586.633 | [KB3192441](https://patchblox.com/security/data/fix/microsoft/kb3192441.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 14393.321 | [KB3194798](https://patchblox.com/security/data/fix/microsoft/kb3194798.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 14393.321 | [KB3194798](https://patchblox.com/security/data/fix/microsoft/kb3194798.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.17146 | [KB3192440](https://patchblox.com/security/data/fix/microsoft/kb3192440.md) | Oct 11, 2016 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.17146 | [KB3192440](https://patchblox.com/security/data/fix/microsoft/kb3192440.md) | Oct 11, 2016 | --- Data as of 2026-11-07T18:46:35Z UTC. 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