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CVE-2019-1429

HighPublished

Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability

Published: Nov 12, 2019
Updated: Jan 12, 2026
Assigning CNA: microsoft
Evidence observed: Nov 22, 2019

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

77.3%

High · next 30 days

Percentile: 99.5%
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

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1426, CVE-2019-1427, CVE-2019-1428.

Sources

Internet Explorer - Use-After-Free in JScript Arguments During toJSON CallbackExploit
Google Security Research · windows · Nov 22, 2019

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