{"id":"CVE-2021-24073","aliases":["EUVD-2021-10989","GHSA-6w2g-frp4-gwrv"],"status":"published","title":"Skype for Business and Lync Spoofing Vulnerability","description":"Skype for Business and Lync Spoofing Vulnerability","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01797,"percentile":0.78739,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-02-25T23:01:37Z","modified":"2026-06-17T03:39:14Z","products":[{"vendor":"microsoft","product":"lync_server"},{"vendor":"microsoft","product":"microsoft lync server 2013"},{"vendor":"microsoft","product":"skype for business server 2015 cu 8"},{"vendor":"microsoft","product":"skype_for_business_server"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24073","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-24073"},{"url":"https://github.com/advisories/GHSA-6w2g-frp4-gwrv"}],"sources":{"cve":[{"id":"CVE-2021-24073","title":"Skype for Business and Lync Spoofing Vulnerability","description":"Skype for Business and Lync Spoofing Vulnerability","status":"published","published":"2021-02-25T23:01:37Z","modified":"2024-08-03T19:21:17.267Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:33:05.000797Z"}],"euvd":[{"id":"EUVD-2021-10989","description":"Skype for Business and Lync Spoofing Vulnerability","status":"published","published":"2021-02-25T23:01:37Z","modified":"2024-08-03T19:21:17Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N/E:P/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T03:24:59.661237Z"}],"ghsa":[{"id":"GHSA-6w2g-frp4-gwrv","title":"Skype for Business and Lync Spoofing Vulnerability","description":"Skype for Business and Lync Spoofing Vulnerability","status":"published","published":"2022-05-24T17:43:15Z","modified":"2024-01-07T05:05:26Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T14:55:20.878476Z"}],"nvd":[{"id":"CVE-2021-24073","description":"Skype for Business and Lync Spoofing Vulnerability","status":"published","published":"2021-02-25T23:15:14.54Z","modified":"2026-06-17T03:39:14.007Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high","assessor":"secondary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:50.399901Z"}]}}