November 3, 2021 · Applied Cybernetics Group
CVE-2021-1647 — Microsoft Defender
Microsoft Defender Remote Code Execution Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Microsoft
- Product
- Defender
- EPSS
- 98.9th percentile (score 0.761, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-1647
CISA short description
Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.
Required action
Apply updates per vendor instructions.