# CVE-2019-0641: Microsoft Edge Security Feature Bypass Vulnerability

CVE-2019-0641 is fixed in 12 products on 1 platform, first by KB4487020, released February 12, 2019. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2019-0641
- Priority: Routine
- CVSS: 4.3 (Moderate)
- EPSS: 0.0343
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Feb 12, 2019
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0641

## Description

<p>A security feature bypass vulnerability exists in the way that Microsoft Edge handles whitelisting. Edge depends on a default whitelist of sites where Adobe Flash will load without user interaction. Because the whitelist was not scheme-aware, an attacker could use a man in the middle attack to cause Flash policies to be bypassed and arbitrary Flash content to be loaded without user interaction.</p> <p>The security update addresses the vulnerability by modifying how Microsoft Edge handles whitelisting.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems | 15063.1631 | [KB4487020](https://patchblox.com/security/data/fix/microsoft/kb4487020.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems | 15063.1631 | [KB4487020](https://patchblox.com/security/data/fix/microsoft/kb4487020.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems | 16299.967 | [KB4486996](https://patchblox.com/security/data/fix/microsoft/kb4486996.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems | 16299.967 | [KB4486996](https://patchblox.com/security/data/fix/microsoft/kb4486996.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems | 16299.967 | [KB4486996](https://patchblox.com/security/data/fix/microsoft/kb4486996.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.590 | [KB4487017](https://patchblox.com/security/data/fix/microsoft/kb4487017.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 17134.590 | [KB4487017](https://patchblox.com/security/data/fix/microsoft/kb4487017.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.590 | [KB4487017](https://patchblox.com/security/data/fix/microsoft/kb4487017.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 17763.316 | [KB4487044](https://patchblox.com/security/data/fix/microsoft/kb4487044.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 17763.316 | [KB4487044](https://patchblox.com/security/data/fix/microsoft/kb4487044.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 17763.316 | [KB4487044](https://patchblox.com/security/data/fix/microsoft/kb4487044.md) | Feb 12, 2019 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 17763.316 | [KB4487044](https://patchblox.com/security/data/fix/microsoft/kb4487044.md) | Feb 12, 2019 |

---

Data as of 2026-11-07T12:40:37Z 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

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.