# CVE-2021-1647

Microsoft Defender Remote Code Execution Vulnerability

- Page: https://www.vulneraibility.com/cve/CVE-2021-1647
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 39.65% (percentile 98.6)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2021-01-23)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2024-01-24)
- Published: 2021-01-12

## Affected

- microsoft:windows_defender
- microsoft:security_essentials
- microsoft:system_center_endpoint_protection

## References

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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.