# CVE-2019-0764: Microsoft Browsers Tampering Vulnerability CVE-2019-0764 is fixed in 44 products on 1 platform, first by KB4493470, released April 9, 2019. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2019-0764 - Priority: Routine - CVSS: 6.3 (Important) - EPSS: 0.0364 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Vendor exploitability assessment: Exploitation Less Likely - Published: Apr 9, 2019 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0764 ## Description

A tampering vulnerability exists when Microsoft browsers do not properly validate input under specific conditions. An attacker who exploited the vulnerability could pass custom command line parameters.

In a web-based attack scenario, an attacker could host a specially crafted website designed to appear as a legitimate website to the user. However, the attacker would have no way to force the user to visit the specially crafted website. The attacker would have to convince the user to visit the specially crafted website, typically by way of enticement in an email or instant message.

The security update addresses the vulnerability by correcting how Microsoft browsers validate input.

## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4493451](https://patchblox.com/security/data/fix/microsoft/kb4493451.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 10 on Windows Server 2012 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for 32-bit Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1703 for x64-based Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for ARM64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for ARM64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 for 32-bit Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 10 for x64-based Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for 32-bit Systems Service Pack 1 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 7 for x64-based Systems Service Pack 1 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for 32-bit systems | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows 8.1 for x64-based systems | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows RT 8.1 | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4493472](https://patchblox.com/security/data/fix/microsoft/kb4493472.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4493446](https://patchblox.com/security/data/fix/microsoft/kb4493446.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2012 R2 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2016 | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 11 on Windows Server 2019 | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for 32-bit Systems Service Pack 2 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4493471](https://patchblox.com/security/data/fix/microsoft/kb4493471.md) | Apr 9, 2019 | | Microsoft | Internet Explorer 9 on Windows Server 2008 for x64-based Systems Service Pack 2 | | [KB4493435](https://patchblox.com/security/data/fix/microsoft/kb4493435.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems | 15063.1746 | [KB4493474](https://patchblox.com/security/data/fix/microsoft/kb4493474.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.1087 | [KB4493441](https://patchblox.com/security/data/fix/microsoft/kb4493441.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.706 | [KB4493464](https://patchblox.com/security/data/fix/microsoft/kb4493464.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems | 10240.18186 | [KB4493475](https://patchblox.com/security/data/fix/microsoft/kb4493475.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2016 | 14393.2906 | [KB4493470](https://patchblox.com/security/data/fix/microsoft/kb4493470.md) | Apr 9, 2019 | | Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 17763.437 | [KB4493509](https://patchblox.com/security/data/fix/microsoft/kb4493509.md) | Apr 9, 2019 | --- Data as of 2026-11-07T18:46:35Z 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.