# CVE-2019-1220: Microsoft Browser Security Feature Bypass Vulnerability CVE-2019-1220 is fixed in 51 products on 1 platform, first by KB4516044, released September 10, 2019. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2019-1220 - Priority: Routine - CVSS: 2.4 (Low) - EPSS: 0.0381 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Sep 10, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1220 ## Description

A security feature bypass vulnerability exists when Microsoft Browsers fail to validate the correct Security Zone of requests for specific URLs. This could allow an attacker to cause a user to access a URL in a less restricted Internet Security Zone than intended.

To exploit this vulnerability, an attacker could email or otherwise provide a specially crafted URL to a victim and convince them to click on it.

The security update addresses the vulnerability by correcting security feature behavior to properly map affected URLs to the correct Security Zone.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4516055](https://patchblox.com/security/data/fix/microsoft/kb4516055.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems | 15063.2045 | [KB4516068](https://patchblox.com/security/data/fix/microsoft/kb4516068.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems | 15063.2045 | [KB4516068](https://patchblox.com/security/data/fix/microsoft/kb4516068.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for ARM64-based Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.18333 | [KB4516070](https://patchblox.com/security/data/fix/microsoft/kb4516070.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.18333 | [KB4516070](https://patchblox.com/security/data/fix/microsoft/kb4516070.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4516065](https://patchblox.com/security/data/fix/microsoft/kb4516065.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4516065](https://patchblox.com/security/data/fix/microsoft/kb4516065.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4516067](https://patchblox.com/security/data/fix/microsoft/kb4516067.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4516067](https://patchblox.com/security/data/fix/microsoft/kb4516067.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows RT 8.1 | | [KB4516067](https://patchblox.com/security/data/fix/microsoft/kb4516067.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4516065](https://patchblox.com/security/data/fix/microsoft/kb4516065.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2012 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4516067](https://patchblox.com/security/data/fix/microsoft/kb4516067.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2016 | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2019 | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4516026](https://patchblox.com/security/data/fix/microsoft/kb4516026.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4516046](https://patchblox.com/security/data/fix/microsoft/kb4516046.md) | Sep 10, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4516026](https://patchblox.com/security/data/fix/microsoft/kb4516026.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems | 15063.2045 | [KB4516068](https://patchblox.com/security/data/fix/microsoft/kb4516068.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems | 15063.2045 | [KB4516068](https://patchblox.com/security/data/fix/microsoft/kb4516068.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.1387 | [KB4516066](https://patchblox.com/security/data/fix/microsoft/kb4516066.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.1006 | [KB4516058](https://patchblox.com/security/data/fix/microsoft/kb4516058.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems | 18362.356 | [KB4515384](https://patchblox.com/security/data/fix/microsoft/kb4515384.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.18333 | [KB4516070](https://patchblox.com/security/data/fix/microsoft/kb4516070.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.18333 | [KB4516070](https://patchblox.com/security/data/fix/microsoft/kb4516070.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2016 | 14393.3204 | [KB4516044](https://patchblox.com/security/data/fix/microsoft/kb4516044.md) | Sep 10, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 17763.737 | [KB4512578](https://patchblox.com/security/data/fix/microsoft/kb4512578.md) | Sep 10, 2019 | --- Data as of 2026-11-08T00:53:09Z 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 Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.