{"schema":"threatline.record/2","record":{"id":"CVE-2021-1647","aliases":[],"summary":"Microsoft Defender Remote Code Execution Vulnerability","details":"Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.","categories":["Unclassified"],"product":"Defender","vendor":"Microsoft","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","source_modified_at":"2025-10-21T23:35:30.058Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft System Center Endpoint Protection","vendor":"Microsoft","versions":[{"version":"N/A","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","source_modified_at":"2025-10-21T23:35:30.058Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft System Center 2012 R2 Endpoint Protection","vendor":"Microsoft","versions":[{"version":"N/A","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","source_modified_at":"2025-10-21T23:35:30.058Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft Security Essentials","vendor":"Microsoft","versions":[{"version":"N/A","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","source_modified_at":"2025-10-21T23:35:30.058Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft System Center 2012 Endpoint Protection","vendor":"Microsoft","versions":[{"version":"N/A","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","source_modified_at":"2025-10-21T23:35:30.058Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Windows Defender","vendor":"Microsoft","versions":[{"version":"N/A","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":7.8,"severity":"High","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2021-11-17","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.39653,"percentile":0.98618,"score_date":"2026-10-23"},"published_at":"2021-01-12T19:42:01.000Z","modified_at":"2025-10-21T23:35:30.058Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-1647","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:35:30.058Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-1647","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1647","source":"CISA KEV"},{"source":"CVE List","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1647","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1647","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1647","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2024-01-24T15:56:07.173473Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2025-10-21T23:35:30.058Z","content_hash":"bdfe99fcbb381780b34ed648b1d91fe064ac0ca755c0a5b9788b8124dc9bd19f"}}