---
id: CVE-2020-1059
title: >-
  A spoofing vulnerability exists when Microsoft Edge does not properly parse
  HTTP content
summary: >-
  A spoofing vulnerability exists when Microsoft Edge does not properly parse
  HTTP content. An attacker who successfully exploited this vulnerability could
  trick a user by redirecting the user to a specially crafted website. The
  specially …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-601
vendor: microsoft
product: edge
affected:
  - edge
published: '2020-05-21'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-1059'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1059'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1059
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.02061
epssPercentile: 0.80498
ingestedAt: '2026-08-19T17:42:36.606Z'
---

## Overview

A spoofing vulnerability exists when Microsoft Edge does not properly parse HTTP content. An attacker who successfully exploited this vulnerability could trick a user by redirecting the user to a specially crafted website. The specially crafted website could either spoof content or serve as a pivot to chain an attack with other vulnerabilities in web services.
To exploit the vulnerability, the user must click a specially crafted URL. In an email attack scenario, an attacker could send an email message containing the specially crafted URL to the user in an attempt to convince the user to click it.
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, and then convince the user to interact with content on the website.
The update addresses the vulnerability by correcting how Microsoft Edge parses HTTP responses.

## Affected

- `edge`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.