CVE-2017-11786

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."

Category

8.8
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 8.80% Top 10%
Vendor Advisory microsoft.com
Affected: Microsoft Corporation Skype for Business
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/101156 vdb entry third party advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786 patch vendor advisory
http://www.securitytracker.com/id/1039530 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-11786?
CVE-2017-11786 has been scored as a high severity vulnerability.
How to fix CVE-2017-11786?
To fix CVE-2017-11786, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-11786 being actively exploited in the wild?
It is possible that CVE-2017-11786 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-11786?
CVE-2017-11786 affects Microsoft Corporation Skype for Business.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.