What’s Vulnerable › Vulnerabilities

CVE-2021-1647: Microsoft Defender Remote Code Execution Vulnerability

• Severity: high (CVSS 7.2 v2.0)
• Exploited in the wild: yes — in CISA KEV since 2021-11-03
• EPSS: 39.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-12 · updated 2026-06-17

Description

Microsoft Defender Remote Code Execution Vulnerability

Affected products

• Microsoft Security Essentials: all versions
• Microsoft System Center Endpoint Protection: 2012, 2012-r2
• Microsoft Windows Defender: all versions
• Microsoft System Center 2012 Endpoint Protection: all versions
• Microsoft System Center 2012 R2 Endpoint Protection: all versions
• Microsoft Security Essentials: all versions
• Microsoft System Center Endpoint Protection: all versions
• Microsoft Windows Defender: all versions

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1647
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1647
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1647

Get alerted when CVE-2021-1647 or the next vulnerability affects your stack