Microsoft Edge (Chromium-based) Update Elevation of Privilege Vulnerability

According to the CVSS metric, Attack Vector is Local (AV:L). What does that mean for this vulnerability?
An attacker would have to have local presence on the device through malware or a malicious application to be able to exploit this 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 gather information specific to the environment and take additional actions prior to exploitation to prepare the target environment.

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Security updates
1.3.195.43 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security