CVE-2017-11786

HighCVSS 8.8/10Last modified Jun 17, 2026

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."

Metrics

CVSS 3.0 8.8/10CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-294

Affected software

Vendor	Product	Versions
Microsoft Corporation	Skype for Business	Microsoft Lync 2013 SP1 and Skype for Business 2016

References

http://www.securityfocus.com/bid/101156Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039530Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786Patch, Vendor Advisory
http://www.securityfocus.com/bid/101156Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039530Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786Patch, Vendor Advisory

Timeline

Published: Oct 13, 2017
Last modified: Jun 17, 2026
NVD status: Modified

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