CVE-2017-11786

Name: CVE-2017-11786
Creator: NVD / NIST
Published: 2017-10-13T13:29:00.833+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 9.39%

Last modified Jun 17, 2026

CVE-2017-11786 is a vulnerability of currently unknown severity. 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.". EPSS estimates a 9.39% chance of exploitation in the next 30 days.

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

EPSS Probability

9.39%

94.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-294

Affected Software

Vendor	Product	Versions	Update
Microsoft	Lync	2013	Sp1
Microsoft	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
Status: Modified

Frequently Asked Questions

What is CVE-2017-11786?

How severe is CVE-2017-11786?

Severity scoring for CVE-2017-11786 is pending analysis. The EPSS model estimates a 9.39% probability of exploitation in the next 30 days.

How do I fix CVE-2017-11786?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-11786?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST