What’s Vulnerable › Vulnerabilities

CVE-2019-1366

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 9.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-10-10 · updated 2026-06-17
• Weakness: CWE-787

Description

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka 'Chakra Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1307, CVE-2019-1308, CVE-2019-1335.

Affected products

• Microsoft ChakraCore: all versions
• 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 1703 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 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

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1366
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1366

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