{"cve_id":"CVE-2021-26857","published":"2021-03-03T00:15:12.167000+00:00","last_modified":"2026-08-19T19:22:27.153000+00:00","vuln_status":"Analyzed","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","base_score":7.8,"base_severity":"HIGH","attack_vector":"LOCAL","privileges_req":"NONE","user_interaction":"REQUIRED","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-502"],"in_kev":true,"kev_date_added":"2021-11-03","kev_ransomware":true,"epss_score":0.95762,"epss_percentile":0.99871,"cap_rule_version":"0.1.1","stage":"EXECUTION","req_access":"NONE","req_vector":"LOCAL","req_user_interaction":true,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:34:18.848181+00:00","first_seen":"2021-03-03T00:15:12.167000+00:00","kev_first_seen":"2021-11-03T00:00:00+00:00","novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["microsoft"],"products":["exchange_server"],"affected":[{"vendor":"microsoft","product":"exchange_server","ranges":["2010","2013","2016","2019"]}]}