{"id":"CVE-2021-24073","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-24073","generatedAt":"2026-10-27T23:28:41.287Z","title":"Skype for Business and Lync Spoofing Vulnerability","description":"Skype for Business and Lync Spoofing Vulnerability","published":"2021-02-25T23:15:15.000Z","lastModified":"2026-06-17T03:39:14.000Z","status":"Modified","sourceIdentifier":"secure@microsoft.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N"},"cwe":[],"affected":["microsoft/lync server","microsoft/skype for business server"],"epss":{"score":0.01797,"percentile":0.783,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.80%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24073","tags":["Patch","Vendor Advisory"],"source":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24073","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-24073","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}