# CVE-2020-0663: Microsoft Edge Elevation of Privilege Vulnerability

CVE-2020-0663 is fixed in 13 products on 1 platform, first by KB4537762, released February 11, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2020-0663
- Priority: Routine
- CVSS: 4.2 (Important)
- EPSS: 0.0157
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Feb 11, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0663

## Description

<p>An elevation of privilege vulnerability exists when Microsoft Edge does not properly enforce cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain.</p> <p>In a web-based attack scenario, an attacker could host a website that is used to attempt to exploit the vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site. An attacker who successfully exploited this vulnerability could elevate privileges in affected versions of Microsoft Edge.</p> <p>The security update addresses the vulnerability by helping to ensure that cross-domain policies are properly enforced in Microsoft Edge.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems | 17134.1304 | [KB4537762](https://patchblox.com/security/data/fix/microsoft/kb4537762.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems | 17134.1304 | [KB4537762](https://patchblox.com/security/data/fix/microsoft/kb4537762.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems | 17134.1304 | [KB4537762](https://patchblox.com/security/data/fix/microsoft/kb4537762.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems | 17763.1039 | [KB4532691](https://patchblox.com/security/data/fix/microsoft/kb4532691.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems | 17763.1039 | [KB4532691](https://patchblox.com/security/data/fix/microsoft/kb4532691.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems | 17763.1039 | [KB4532691](https://patchblox.com/security/data/fix/microsoft/kb4532691.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for 32-bit Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for ARM64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for x64-based Systems |  | [KB4532693](https://patchblox.com/security/data/fix/microsoft/kb4532693.md) | Feb 11, 2020 |
| Microsoft | Microsoft Edge (EdgeHTML-based) on Windows Server 2019 | 17763.1039 | [KB4532691](https://patchblox.com/security/data/fix/microsoft/kb4532691.md) | Feb 11, 2020 |

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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

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