{"id":"CVE-2021-34517","title":"Microsoft SharePoint Server Spoofing Vulnerability","summary":"Microsoft SharePoint Server Spoofing Vulnerability","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","vendor":"microsoft","product":"sharepoint_foundation","affected":["sharepoint_foundation = 2013","sharepoint_server = 2013","sharepoint_server = 2016","sharepoint_server = 2019"],"published":"2021-07-14","updated":"2026-08-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-34517","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34517","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34517","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.0195,"epssPercentile":0.79078,"ingestedAt":"2026-08-10T16:41:17.318Z","slug":"CVE-2021-34517","body":"## Overview\n\nMicrosoft SharePoint Server Spoofing Vulnerability\n\n## Affected\n\n- `sharepoint_foundation = 2013`\n- `sharepoint_server = 2013`\n- `sharepoint_server = 2016`\n- `sharepoint_server = 2019`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.2,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}