Windows HMAC Key Derivation Elevation of Privilege Vulnerability

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

How could an attacker exploit this vulnerability?
To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.

According to the CVSS metric, a successful exploitation could lead to a scope change (S:C). What does this mean for this vulnerability?
In this case, a successful attack could be performed from a low privilege Hyper-V guest. The attacker could traverse the guest's security boundary to execute code on the Hyper-V host execution environment.

Security updates
10.0.17763.5122 — https://support.microsoft.com/help/5032196
10.0.20348.2113 — https://support.microsoft.com/help/5032198
10.0.20348.2091 — https://support.microsoft.com/help/5032304
10.0.22000.2600 — https://support.microsoft.com/help/5032192
10.0.19043.3693 — https://support.microsoft.com/help/5032189
10.0.22621.2715 — https://support.microsoft.com/help/5032190
10.0.25398.531 — https://support.microsoft.com/help/5032202
10.0.10240.20308 — https://support.microsoft.com/help/5032199
10.0.14393.6452 — https://support.microsoft.com/help/5032197