{"cve":"CVE-2017-11786","nvd":{"published":"2017-10-13T13:29:00.833","modified":"2026-06-17T01:02:22.123","status":"Modified","description":"Skype for Business in Microsoft Lync 2013 SP1 and Skype for Business 2016 allows an attacker to steal an authentication hash that can be reused elsewhere, due to how Skype for Business handles authentication requests, aka \"Skype for Business Elevation of Privilege Vulnerability.\"","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-294"],"references":["http://www.securityfocus.com/bid/101156","http://www.securitytracker.com/id/1039530","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786","http://www.securityfocus.com/bid/101156","http://www.securitytracker.com/id/1039530"],"products":["microsoft:lync","microsoft:skype_for_business"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2017-11786","score":0.09392,"percentile":0.95406,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}