{"id":"CVE-2021-31196","aliases":["EUVD-2021-18109","GHSA-5jv9-cff9-2j3m"],"status":"published","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.54056,"percentile":0.99019,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"published":"2021-07-14T17:53:12Z","modified":"2026-08-10T19:58:38Z","kev":{"date_added":"2024-08-21","due_date":"2024-09-11","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"exploitation":[{"source":"euvd","since":"2024-08-21"},{"source":"kev","since":"2024-08-21"}],"products":[{"vendor":"microsoft","product":"exchange server"},{"vendor":"microsoft","product":"exchange_server"},{"vendor":"microsoft","product":"microsoft exchange server 2013 cumulative update 23"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 20"},{"vendor":"microsoft","product":"microsoft exchange server 2016 cumulative update 21"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 10"},{"vendor":"microsoft","product":"microsoft exchange server 2019 cumulative update 9"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31196"},{"url":"https://github.com/advisories/GHSA-5jv9-cff9-2j3m"}],"sources":{"cve":[{"id":"CVE-2021-31196","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:53:12Z","modified":"2026-08-10T15:10:55.448Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18109","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T17:53:12Z","modified":"2026-08-10T15:10:55Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"exploited_since":"2024-08-21","updated_at":"2026-11-02T18:02:05.005873Z"}],"ghsa":[{"id":"GHSA-5jv9-cff9-2j3m","title":"Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021...","description":"Microsoft Exchange Server Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-31206, CVE-2021-34473.","status":"published","published":"2022-05-24T19:07:57Z","modified":"2026-08-10T18:30:29Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:10:14.126548Z"}],"kev":[{"id":"CVE-2021-31196","title":"Microsoft Exchange Server Information Disclosure Vulnerability","description":"Microsoft Exchange Server contains an information disclosure vulnerability that allows for remote code execution.","kev":{"date_added":"2024-08-21","due_date":"2024-09-11","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","known_ransomware_use":"Unknown"},"updated_at":"2026-11-02T17:00:16.234141Z"}],"nvd":[{"id":"CVE-2021-31196","description":"Microsoft Exchange Server Remote Code Execution Vulnerability","status":"published","published":"2021-07-14T18:15:09.463Z","modified":"2026-08-10T19:58:38.973Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":6.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}