What’s Vulnerable › Vulnerabilities

CVE-2019-1255

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-09-23 · updated 2026-06-17

Description

A denial of service vulnerability exists when Microsoft Defender improperly handles files, aka 'Microsoft Defender Denial of Service Vulnerability'.

Affected products

• Microsoft Forefront Endpoint Protection 2010: all versions
• Microsoft Security Essentials: all versions
• Microsoft System Center Endpoint Protection: 2012, 2012-r2
• Microsoft Windows Defender: all versions
• Microsoft Forefront Endpoint Protection: 2010
• Microsoft System Center: 2012 Endpoint Protection, Endpoint Protection, 2012 R2 Endpoint Protection
• Microsoft Security Essentials: all versions
• Microsoft Windows Defender on Windows 10 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1607 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1607 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1703 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1703 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1709 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1709 for ARM64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1709 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1803 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1803 for ARM64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1803 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1809 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1809 for ARM64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1809 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1903 for 32-bit Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1903 for ARM64-based Systems: all versions
• Microsoft Windows Defender on Windows 10 Version 1903 for x64-based Systems: all versions
• Microsoft Windows Defender on Windows 7 for 32-bit Systems: Service Pack 1
• Microsoft Windows Defender on Windows 7 for x64-based Systems: Service Pack 1
• Microsoft Windows Defender on Windows 8.1 for 32-bit systems: all versions
• Microsoft Windows Defender on Windows 8.1 for x64-based systems: all versions
• Microsoft Windows Defender on Windows RT 8.1: all versions

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1255
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1255

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