{"cve_id":"CVE-2021-1647","published":"2021-01-12T20:15:30.727000+00:00","last_modified":"2026-06-17T03:32:13.953000+00:00","vuln_status":"Analyzed","description":"Microsoft Defender Remote Code Execution Vulnerability","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","base_score":7.8,"base_severity":"HIGH","attack_vector":"LOCAL","privileges_req":"LOW","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":[],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":false,"epss_score":0.39653,"epss_percentile":0.98618,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"USER","req_vector":"LOCAL","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"medium","ingested_at":"2026-09-18T09:29:21.966562+00:00","first_seen":"2021-01-12T20:15:30.727000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["microsoft"],"products":["security_essentials","system_center_endpoint_protection","windows_10_1507","windows_10_1607","windows_10_1803","windows_10_1809","windows_10_1909","windows_10_2004","windows_10_20h2","windows_7","windows_8.1","windows_defender","windows_rt_8.1","windows_server_1909","windows_server_2004","windows_server_2008","windows_server_2012","windows_server_2016","windows_server_2019","windows_server_20h2"],"affected":[{"vendor":"microsoft","product":"security_essentials","ranges":["all versions"]},{"vendor":"microsoft","product":"system_center_endpoint_protection","ranges":["all versions","2012"]},{"vendor":"microsoft","product":"windows_defender","ranges":["all versions"]}]}