{"id":"CVE-2021-31206","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","summary":"Microsoft Exchange Server Remote Code Execution Vulnerability","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L","vendor":"microsoft","product":"exchange_server","affected":["exchange_server = 2013","exchange_server = 2016","exchange_server = 2019"],"published":"2021-07-14","updated":"2026-08-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-31206","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31206","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-826/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd","in-the-wild"],"epss":0.13006,"epssPercentile":0.96156,"exploited":true,"zeroDay":true,"ingestedAt":"2026-08-10T16:41:14.375Z","slug":"CVE-2021-31206","body":"## Overview\n\nMicrosoft Exchange Server Remote Code Execution Vulnerability\n\n## Affected\n\n- `exchange_server = 2013`\n- `exchange_server = 2016`\n- `exchange_server = 2019`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":69,"depthScoreParts":{"impact":41.8,"likelihood":2.6,"exploitation":25,"ransomware":0},"changes":[]}