Windows HTML Platforms Security Feature Bypass Vulnerability

What kind of security feature could be bypassed by successfully exploiting this vulnerability?
The MapURLToZone method could be bypassed by an attacker if the API returned a Zone value of 'Intranet' by passing a URL with a device path to the Lanman redirector device object. The same is true of the WebDav device.

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 prepare the target environment to improve exploit reliability.

Security updates
10.0.17763.5329 — https://support.microsoft.com/help/5034127
10.0.20348.2227 — https://support.microsoft.com/help/5034129
10.0.22000.2713 — https://support.microsoft.com/help/5034121
10.0.19044.3930 — https://support.microsoft.com/help/5034122
10.0.22621.3007 — https://support.microsoft.com/help/5034123
10.0.10240.20402 — https://support.microsoft.com/help/5034134
10.0.14393.6614 — https://support.microsoft.com/help/5034119
6.1.7601.26910 — https://support.microsoft.com/help/5034169
6.1.7601.26910 — https://support.microsoft.com/help/5034167
1.001 — https://support.microsoft.com/help/5034120
6.2.9200.24664 — https://support.microsoft.com/help/5034184
6.3.9600.21765 — https://support.microsoft.com/help/5034171
10.0.25398.643 — https://support.microsoft.com/help/5034130