What’s Vulnerable › Vulnerabilities

CVE-2020-1073

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-09 · updated 2026-06-17
• Weakness: CWE-787

Description

A remote code execution vulnerability exists in the way that the ChakraCore scripting engine handles objects in memory, aka 'Scripting Engine Memory Corruption Vulnerability'.

Affected products

• Microsoft ChakraCore: before 1.11.20 — fixed in 1.11.20
• 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 10 Version 1909 for 32-bit Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 for ARM64-based Systems: all versions
• Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1909 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 1.11.20. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1073
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1073

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