{"id":"CVE-2026-66308","aliases":[],"title":"Skype for Business and Lync Denial of Service Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","products":[{"vendor":"Microsoft","name":"Skype for Business Server 2015 CU13","platforms":["x64-based Systems"],"versions":[{"version":"9319.0","status":"affected","lessThan":"6.0.9319.885","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66308"},{"vendor":"Microsoft","name":"Skype for Business Server 2019 CU8","platforms":["x64-based Systems"],"versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.569","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66308"},{"vendor":"Microsoft","name":"Skype for Business Server Subscription Edition CU1","platforms":["x64-based Systems"],"versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.879","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-66308"}],"remediation":[],"description":"Out-of-bounds read in Skype for Business allows an authorized attacker to deny service over a network.","severity":"medium","score":6.5,"published":"2026-09-08T18:30:36.611Z","modified":"2026-10-26T23:24:45.526Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66308"],"sources":[{"name":"CVE","id":"CVE-2026-66308","modified":"2026-10-26T23:24:45.526Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-66308"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","score":6.5}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T02:20:33.012Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}