Windows Point-to-Point Tunneling Protocol Remote Code Execution Vulnerability

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.

How could an attacker exploit the vulnerability?
To exploit this vulnerability, an attacker would need to send a specially crafted malicious PPTP packet to a PPTP server. This could result in remote code execution on the server side.

Security updates
10.0.17763.3532 — https://support.microsoft.com/help/5018419
10.0.19043.2130 — https://support.microsoft.com/help/5018410
10.0.20348.1129 — https://support.microsoft.com/help/5018421
10.0.22000.1098 — https://support.microsoft.com/help/5018418
10.0.22621.674 — https://support.microsoft.com/help/5018427
10.0.10240.19507 — https://support.microsoft.com/help/5018425
10.0.14393.5427 — https://support.microsoft.com/help/5018411
6.1.7601.26174 — https://support.microsoft.com/help/5018454
6.1.7601.26174 — https://support.microsoft.com/help/5018479
6.3.9600.20625 — https://support.microsoft.com/help/5018474
6.3.9600.20625 — https://support.microsoft.com/help/5018476
6.2.9200.23920 — https://support.microsoft.com/help/5018457
6.2.9200.23920 — https://support.microsoft.com/help/5018478