Secure Boot Security Feature Bypass Vulnerability

According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?
An authenticated attacker could exploit this vulnerability with LAN access.

How could an attacker successfully exploit this vulnerability?
To exploit the vulnerability, an attacker who has physical access or Administrative rights to a target device could install a malicious .wim file

What kind of security feature could be bypassed by successfully exploiting this vulnerability?
An attacker who successfully exploited this vulnerability could bypass Secure Boot.

Security updates
10.0.17763.6054 — https://support.microsoft.com/help/5040430
10.0.20348.2582 — https://support.microsoft.com/help/5040437
10.0.22000.3079 — https://support.microsoft.com/help/5040431
10.0.19044.4651 — https://support.microsoft.com/help/5040427
10.0.22621.3880 — https://support.microsoft.com/help/5040442
10.0.25398.1009 — https://support.microsoft.com/help/5040438
10.0.10240.20710 — https://support.microsoft.com/help/5040448
10.0.14393.7159 — https://support.microsoft.com/help/5040434
6.2.9200.24975 — https://support.microsoft.com/help/5040485
6.3.9600.22074 — https://support.microsoft.com/help/5040456