---
id: "CVE-2017-0037"
kind: "vulnerability"
aliases: ["CVE-2017-0037"]
title: "Microsoft Edge and Internet Explorer: Microsoft Edge and Internet Explorer Type Confusion Vulnerability"
severity: "high"
cvss: 8.1
epss: 0.80386
exploited: true
status: "open"
category: "other"
products: [{"name": "Microsoft Edge and Internet Explorer", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "internet-explorer", "microsoft-edge", "other", "windows"]
not_affected_if: ["unpatched-systems-only"]
published_at: "2017-02-26T23:59:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0037", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2017-0037", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-0037", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# Microsoft Edge and Internet Explorer: Microsoft Edge and Internet Explorer Type Confusion Vulnerability

Microsoft Edge and Internet Explorer have a type confusion flaw in mshtml.dll that lets a crafted web page run code. An attacker who gets a user to load that page can execute code as that user.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Edge and Internet Explorer affected ? fixed ?

## Fix

Apply the Microsoft security updates for Edge and Internet Explorer per vendor instructions, as CISA requires. Fixed versions are not stated in the sources.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2017-0037
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2017-0037
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2017-0037

## From the sources

Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_