CVE-2017-0037highunder attackCWE-843

CVE-2017-0037: high-severity vulnerability in Microsoft Corporation Internet Browser

Published 26 Feb 2017 · Updated 21 Oct 2025

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93Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.1epss 80%

from disclosure to weaponsame day

Published on NVDFeb 26

1st PoCFeb 24

CISA KEV+1856d

Action required by CISAfederal deadline: 2022-04-18

Apply updates per vendor instructions.

In short

Internet Explorer 10, 11, and Microsoft Edge contain a flaw where specially crafted CSS and JavaScript code can confuse the browser about data types, allowing attackers to run malicious code on your computer. This happens when visiting a malicious website.

Technical detail

Type confusion vulnerability in mshtml.dll's Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function exploitable via crafted CSS token sequences combined with JavaScript DOM manipulation of TH elements. Remote code execution is possible without user authentication beyond visiting a malicious webpage; exploitation requires the victim to access attacker-controlled content.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Microsoft Corporation · Internet Browser

public PoCs found — 7✓ VexDay Proof

exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/43125 exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/41454 exploitdbwww.exploit-db.com/exploits/42354unverified githubgithub.com/chattopadhyaykittu/CVE-2017-0037★ 0 cve_referencewww.exploit-db.com/exploits/43125/unverified cve_referencewww.exploit-db.com/exploits/41454/unverified cve_referencewww.exploit-db.com/exploits/42354/unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://0patch.blogspot.si/2017/03/0patching-another-0-day-internet.html https://bugs.chromium.org/p/project-zero/issues/detail?id=1011 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0037 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0037 https://www.exploit-db.com/exploits/41454/https://www.exploit-db.com/exploits/42354/https://www.exploit-db.com/exploits/43125/http://www.securityfocus.com/bid/96088 http://www.securitytracker.com/id/1037905 http://www.securitytracker.com/id/1037906