What’s Vulnerable › Vulnerabilities

CVE-2019-1426

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-11-12 · updated 2026-06-17
• Weakness: CWE-787

Description

A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge (HTML-based), aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1427, CVE-2019-1428, CVE-2019-1429.

Affected products

• Microsoft ChakraCore: before 1.11.15 — fixed in 1.11.15
• Microsoft Edge: all versions
• Microsoft ChakraCore: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for ARM64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for ARM64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for ARM64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1809 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for ARM64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1903 for x64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows Server 2016: all versions
• Microsoft Edge (EdgeHTML-based) on Windows Server 2019: all versions

How to fix

Upgrade to a fixed version: Microsoft ChakraCore 1.11.15. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1426
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1426

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