Win32 Stream Enumeration 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 take additional actions prior to exploitation to prepare the target environment.

According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
This vulnerability requires that a user with an affected version of Windows access a malicious server. An attacker would have to host a specially crafted server share or website. An attacker would have no way to force users to visit this specially crafted server share or website, but would have to convince them to visit the server share or website, typically by way of an enticement in an email or chat message.

Security updates
10.0.17763.2803 — https://support.microsoft.com/help/5012647
10.0.18363.2212 — https://support.microsoft.com/help/5012591
10.0.19043.1645 — https://support.microsoft.com/help/5012599
10.0.20348.643 — https://support.microsoft.com/help/5012604
10.0.22000.613 — https://support.microsoft.com/help/5012592
10.0.10240.19265 — https://support.microsoft.com/help/5012653
10.0.14393.5066 — https://support.microsoft.com/help/5012596
6.1.7601.25924 — https://support.microsoft.com/help/5012626
6.1.7601.25924 — https://support.microsoft.com/help/5012649
6.3.9600.20337 — https://support.microsoft.com/help/5012670
6.3.9600.20337 — https://support.microsoft.com/help/5012639
6.0.6003.21446 — https://support.microsoft.com/help/5012658
6.0.6003.21446 — https://support.microsoft.com/help/5012632
6.2.9200.23679 — https://support.microsoft.com/help/5012650
6.2.9200.23679 — https://support.microsoft.com/help/5012666