Layer 2 Tunneling Protocol Remote Code Execution Vulnerability

How could an attacker exploit this vulnerability?
An unauthenticated attacker could send a specially crafted protocol message to a Routing and Remote Access Service (RRAS) server, which could lead to remote code execution (RCE) on the RAS server machine.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to win a race condition.

Security updates
10.0.17763.4974 — https://support.microsoft.com/help/5031361
10.0.20348.2031 — https://support.microsoft.com/help/5031364
10.0.22000.2538 — https://support.microsoft.com/help/5031358
10.0.19041.3570 — https://support.microsoft.com/help/5031356
10.0.22621.2428 — https://support.microsoft.com/help/5031354
10.0.10240.20232 — https://support.microsoft.com/help/5031377
10.0.14393.6351 — https://support.microsoft.com/help/5031362
6.0.6003.22317 — https://support.microsoft.com/help/5031416
6.0.6003.22317 — https://support.microsoft.com/help/5031411
6.1.7601.26769 — https://support.microsoft.com/help/5031408
6.1.7601.26769 — https://support.microsoft.com/help/5031441
6.2.9200.24523 — https://support.microsoft.com/help/5031442
6.2.9200.24523 — https://support.microsoft.com/help/5031427
6.3.9600.21620 — https://support.microsoft.com/help/5031419
6.3.9600.21620 — https://support.microsoft.com/help/5031407