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CVE-2014-0322

HighPublished

Microsoft Internet Explorer Use-After-Free Vulnerability

Published: Feb 14, 2014
Updated: Oct 22, 2025
Assigning CNA: microsoft
Evidence observed: Apr 14, 2014

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

85.1%

High · next 30 days

Percentile: 99.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Use-after-free vulnerability in Microsoft Internet Explorer 9 and 10 allows remote attackers to execute arbitrary code via vectors involving crafted JavaScript code, CMarkup, and the onpropertychange attribute of a script element, as exploited in the wild in January and February 2014.

Sources

Microsoft Internet Explorer 10 - CMarkup Use-After-Free (MS14-012)Exploit
Jean-Jamil Khalife · windows · Apr 14, 2014
Microsoft Internet Explorer - CMarkup Use-After-Free (MS14-012) (Metasploit)Exploit
Metasploit · windows · Apr 16, 2014

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