CVE-2019-1001

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-07-15 · updated 2026-06-17
Weakness: CWE-787

Description

A remote code execution vulnerability exists in the way the scripting engine handles objects in memory in Microsoft browsers, aka 'Scripting Engine Memory Corruption Vulnerability'. This CVE ID is unique from CVE-2019-1004, CVE-2019-1056, CVE-2019-1059.

Affected products

Microsoft ChakraCore: before 1.11.11 — fixed in 1.11.11
Microsoft Edge: all versions
Microsoft Internet Explorer 11: 11
Microsoft ChakraCore: all versions
Microsoft Edge: Windows 10 for 32-bit Systems, Windows 10 for x64-based Systems, Windows Server 2016, Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1703 for 32-bit Systems (+11)
Microsoft Internet Explorer 11: Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1, Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems, Windows Server 2012 R2 (+18)
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for 32-bit Systems: all versions
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for ARM64-based Systems: all versions
Microsoft Internet Explorer 11 on Windows 10 Version 1903 for x64-based Systems: all versions
Microsoft Internet Explorer 11 on Windows Server 2012: all versions
Microsoft Edge on Windows 10 Version 1903 for 32-bit Systems: all versions
Microsoft Edge on Windows 10 Version 1903 for ARM64-based Systems: all versions
Microsoft Edge on Windows 10 Version 1903 for x64-based Systems: all versions

How to fix

Upgrade to a fixed version: Microsoft ChakraCore 1.11.11. Check the vendor advisory for mitigations.

References

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