Windows Fax Service Remote Code Execution Vulnerability

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 will need to first gain access to the restricted network before running an attack.

According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to compromise admin credentials on the device.

Security updates
10.0.17763.4010 — https://support.microsoft.com/help/5022840
10.0.20348.1547 — https://support.microsoft.com/help/5022842
10.0.20348.1540 — https://support.microsoft.com/help/5022921
10.0.19042.2604 — https://support.microsoft.com/help/5022834
10.0.22621.1574 — https://support.microsoft.com/help/5022836
10.0.22621.1265 — https://support.microsoft.com/help/5022845
10.0.10240.19747 — https://support.microsoft.com/help/5022858
10.0.14393.5717 — https://support.microsoft.com/help/5022838
6.0.6003.21915 — https://support.microsoft.com/help/5022890
6.0.6003.21915 — https://support.microsoft.com/help/5022893
6.1.7601.26366 — https://support.microsoft.com/help/5022872
6.1.7601.26366 — https://support.microsoft.com/help/5022874
6.2.9200.24116 — https://support.microsoft.com/help/5022903
6.2.9200.24116 — https://support.microsoft.com/help/5022895
6.3.9600.20821 — https://support.microsoft.com/help/5022899
6.3.9600.20821 — https://support.microsoft.com/help/5022894