CVE Tools
Sign in

CVE-2017-11786

Published: Oct 13, 2017Updated: May 13, 2026 Sources: CVE List NVD BDUCWE-294
8.8HIGH
NVD MITRE
EPSS Score
9.4%
Top 5.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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."

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-294

Affected Products

Microsoft Corp
commercial·USaka microsoft, microsoft corporation
lyncOn-premWeb App
Communications / messaging-chat
Skype for BusinessOn-premDesktop App
Communications / messaging-chat
Microsoft LyncOn-premDesktop App
Communications / messaging-chat
Microsoft Corporation
commercial·USaka microsoft
Skype for BusinessOn-premDesktop App
Communications / messaging-chat
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2017-11786?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Defense Evasion
View detailed technique mapping

References

http://www.securityfocus.com/bid/101156
securityfocus.com
http://www.securitytracker.com/id/1039530
securitytracker.com
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786
portal.msrc.microsoft.com
and 2 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2017-11786 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows