Windows Telephony Service Elevation of Privilege Vulnerability

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires that an attacker needs to be in the same restricted Active Directory domain as the target system. The attack surface is not reachable from broader networks, which is why the attack vector is considered adjacent (AV:A).

How could an attacker exploit this vulnerability?
An attacker could exploit this vulnerability by sending specially crafted malicious traffic to a vulnerable server.

Security updates
10.0.28000.1719 — https://support.microsoft.com/help/5079466
10.0.17763.8511 — https://support.microsoft.com/help/5078752
10.0.20348.4893 — https://support.microsoft.com/help/5078766
10.0.20348.4830 — https://support.microsoft.com/help/5078737
10.0.19044.7058 — https://support.microsoft.com/help/5078885
10.0.26100.32522 — https://support.microsoft.com/help/5078740
10.0.26100.32463 — https://support.microsoft.com/help/5078736
10.0.26200.8037 — https://support.microsoft.com/help/5079473
10.0.26200.7979 — https://support.microsoft.com/help/5079420
10.0.22631.6783 — https://support.microsoft.com/help/5078883
10.0.25398.2207 — https://support.microsoft.com/help/5078734
10.0.14393.8957 — https://support.microsoft.com/help/5078938
6.2.9200.25973 — https://support.microsoft.com/help/5078775
6.3.9600.23074 — https://support.microsoft.com/help/5078774