{"id":"CVE-2021-31196","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","summary":"Microsoft Exchange Server Remote Code Execution Vulnerability","severity":"high","cvss":7.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","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-2021-31196","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-31196","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31196","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31196","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild"],"epss":0.54056,"epssPercentile":0.98969,"kev":true,"kevDateAdded":"2024-08-21","kevDueDate":"2024-09-11","kevRansomware":false,"exploited":true,"ingestedAt":"2026-08-10T16:41:14.342Z","slug":"CVE-2021-31196","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":75,"depthScoreParts":{"impact":39.6,"likelihood":10.8,"exploitation":25,"ransomware":0},"changes":[{"seq":126,"id":"CVE-2021-31196","ts":1786478076283,"field":"epss","old":"0.4638","new":"0.54056"}]}