Windows Secure Socket Tunneling Protocol (SSTP) 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 SSTP packet to a SSTP server. This could result in remote code execution on the server side.

Security updates
10.0.17763.4377 — https://support.microsoft.com/help/5026362
10.0.20348.1726 — https://support.microsoft.com/help/5026370
10.0.20348.1724 — https://support.microsoft.com/help/5026456
10.0.19042.2965 — https://support.microsoft.com/help/5026361
10.0.22000.1936 — https://support.microsoft.com/help/5026368
10.0.22621.1702 — https://support.microsoft.com/help/5026372
10.0.10240.19926 — https://support.microsoft.com/help/5026382
10.0.14393.5921 — https://support.microsoft.com/help/5026363
6.0.6003.22070 — https://support.microsoft.com/help/5026408
6.0.6003.22070 — https://support.microsoft.com/help/5026427
6.1.7601.26519 — https://support.microsoft.com/help/5026413
6.1.7601.26519 — https://support.microsoft.com/help/5026426
6.2.9200.24266 — https://support.microsoft.com/help/5026419
6.2.9200.24266 — https://support.microsoft.com/help/5026411
6.3.9600.20969 — https://support.microsoft.com/help/5026415
6.3.9600.20969 — https://support.microsoft.com/help/5026409