CVE-2017-11786 is an elevation of privilege vulnerability affecting Microsoft Lync 2013 SP1 and Skype for Business 2016. It allows an attacker to steal an authentication hash due to how these applications handle authentication requests. With a CVSS score of 8.8 (HIGH), this vulnerability has a high impact on confidentiality, integrity, and availability, requiring user interaction but being exploitable over the network with low attack complexity. While no public exploit code (Metasploit, Nuclei, ExploitDB) is available and it's not listed in CISA's KEV catalog, it has garnered some community discussion and media coverage, indicating awareness of its potential.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2013CPE matchmatch criteria | cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:* | ||
2016CPE matchmatch criteria | cpe:2.3:a:microsoft:skype_for_business:2016:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.