{"id":"CVE-2018-8238","aliases":["EUVD-2018-19905","GHSA-v74r-x7x3-53vj"],"status":"published","title":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly...","description":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync.","severity":{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.05988,"percentile":0.93359,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2018-07-11T00:00:00Z","modified":"2026-06-17T02:04:29Z","products":[{"vendor":"microsoft","product":"lync"},{"vendor":"microsoft","product":"microsoft lync"},{"vendor":"microsoft","product":"skype"},{"vendor":"microsoft","product":"skype_for_business"}],"references":[{"url":"http://www.securityfocus.com/bid/104619","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8238","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8238"},{"url":"https://github.com/advisories/GHSA-v74r-x7x3-53vj"}],"sources":{"cve":[{"id":"CVE-2018-8238","description":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync.","status":"published","published":"2018-07-11T00:00:00Z","modified":"2024-08-05T06:46:13.83Z","updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-19905","description":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync.","status":"published","published":"2018-07-11T00:00:00Z","modified":"2024-08-05T06:46:13Z","updated_at":"2026-11-03T02:40:03.749866Z"}],"ghsa":[{"id":"GHSA-v74r-x7x3-53vj","title":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly...","description":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync.","status":"published","published":"2022-05-13T01:53:36Z","modified":"2023-02-02T05:02:22Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:51:25.546182Z"}],"nvd":[{"id":"CVE-2018-8238","description":"A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages, aka \"Skype for Business and Lync Security Feature Bypass Vulnerability.\" This affects Skype, Microsoft Lync.","status":"published","published":"2018-07-11T00:29:00.647Z","modified":"2026-06-17T02:04:29.33Z","cvss":[{"version":"3.0","score":7.8,"vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:04:32.929986Z"}]}}