{"id":"CVE-2021-34501","title":"Microsoft Excel Remote Code Execution Vulnerability","summary":"Microsoft Excel Remote Code Execution Vulnerability","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","vendor":"microsoft","product":"365_apps","affected":["365_apps","excel = 2013","excel = 2016","office = 2019","office_online_server"],"published":"2021-07-14","updated":"2026-08-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-34501","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34501","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34501","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-969/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.51392,"epssPercentile":0.98903,"zeroDay":true,"ingestedAt":"2026-08-10T16:41:16.931Z","slug":"CVE-2021-34501","body":"## Overview\n\nMicrosoft Excel Remote Code Execution Vulnerability\n\n## Affected\n\n- `365_apps`\n- `excel = 2013`\n- `excel = 2016`\n- `office = 2019`\n- `office_online_server`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":78,"depthScoreParts":{"impact":42.9,"likelihood":10.3,"exploitation":25,"ransomware":0},"changes":[]}