What’s Vulnerable › Vulnerabilities

CVE-2019-1220

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-11 · updated 2026-06-17
• Weakness: CWE-425

Description

A security feature bypass vulnerability exists when Microsoft Browsers fail to validate the correct Security Zone of requests for specific URLs, aka 'Microsoft Browser Security Feature Bypass Vulnerability'.

Affected products

• Microsoft Edge: all versions
• Microsoft Internet Explorer 11: 9, 10, 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 10: Windows Server 2012
• 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 Internet Explorer 9: Windows Server 2008 for 32-bit Systems Service Pack 2, Windows Server 2008 for x64-based Systems Service Pack 2
• 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-2019-1220
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1220

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