Microsoft SharePoint Server Spoofing Vulnerability

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
This vulnerability requires that a user with an affected version of Windows access a malicious server. An attacker would have to host a specially crafted server share or website. An attacker would have no way to force users to visit this specially crafted server share or website, but would have to convince them to visit the server share or website, typically by way of an enticement in an email or chat message.

How could an attacker exploit this vulnerability?
A standard user who has been authenticated in the domain could potentially use this vulnerability to send malicious content in SIP Address field which would allow the user to have access to content that is not authorized.

Security updates
16.0.5305.1000 — https://support.microsoft.com/kb/5002183
16.0.10385.20001 — https://support.microsoft.com/kb/5002180
16.0.14931.20196 — https://support.microsoft.com/help/5002191
15.0.5441.1000 — https://support.microsoft.com/kb/5002189