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Microsoft Internet Explorer CMarkup Use-After-Free

ID: 87461e21-48f4-598e-afee-a70fafaf4042

STIX ID: report--87461e21-48f4-598e-afee-a70fafaf4042

Feed Name: NCC Research

Threat Score
55/100

Date Published: 2025-12-02

Date Updated: 2026-08-01

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#### Executive Summary: This NCC Group advisory describes a high-risk Use-After-Free memory corruption vulnerability in Microsoft Internet Explorer's CMarkup component (CVE-2014-1799) affecting IE6–11 that could enable remote code execution; the issue was discovered and reported in May 2014 and addressed by Microsoft in security update MS14-035.

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