A security feature bypass vulnerability exists in Internet Explorer that allows for bypassing Mixed Content warnings. This could allow for the loading of unsecure content (HTTP) from secure locations (HTTPS).
In a web-based attack scenario, an attacker could host a malicious website that is designed to exploit the security feature bypass. Alternatively, in an email or instant message attack scenario, the attacker could send the targeted user a specially crafted .url file that is designed to exploit the bypass. Additionally, compromised websites or websites that accept or host user-provided content could contain specially crafted content to exploit the security feature bypass. However, in all cases an attacker would have no way to force a user to view attacker-controlled content. Instead, an attacker would have to convince a user to take action. For example, an attacker could entice a user to either click a link that directs the user to the attacker's site or send a malicious attachment.
The security update addresses the security feature bypass by correcting how Internet Explorer handles mixed content.
## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4019216](https://patchblox.com/security/data/fix/microsoft/kb4019216.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems | 10586.916 | [KB4019473](https://patchblox.com/security/data/fix/microsoft/kb4019473.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems | 10586.916 | [KB4019473](https://patchblox.com/security/data/fix/microsoft/kb4019473.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.1198 | [KB4019472](https://patchblox.com/security/data/fix/microsoft/kb4019472.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.1198 | [KB4019472](https://patchblox.com/security/data/fix/microsoft/kb4019472.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems | | [KB4016871](https://patchblox.com/security/data/fix/microsoft/kb4016871.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems | | [KB4016871](https://patchblox.com/security/data/fix/microsoft/kb4016871.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.17394 | [KB4019474](https://patchblox.com/security/data/fix/microsoft/kb4019474.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.17394 | [KB4019474](https://patchblox.com/security/data/fix/microsoft/kb4019474.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4019264](https://patchblox.com/security/data/fix/microsoft/kb4019264.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4019264](https://patchblox.com/security/data/fix/microsoft/kb4019264.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4019215](https://patchblox.com/security/data/fix/microsoft/kb4019215.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4019215](https://patchblox.com/security/data/fix/microsoft/kb4019215.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows RT 8.1 | | [KB4019215](https://patchblox.com/security/data/fix/microsoft/kb4019215.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4019264](https://patchblox.com/security/data/fix/microsoft/kb4019264.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4019215](https://patchblox.com/security/data/fix/microsoft/kb4019215.md) | May 9, 2017 | | Microsoft | Internet Explorer 11 on Windows Server 2016 | 14393.1198 | [KB4019472](https://patchblox.com/security/data/fix/microsoft/kb4019472.md) | May 9, 2017 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4018271](https://patchblox.com/security/data/fix/microsoft/kb4018271.md) | May 9, 2017 | --- 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