Windows Backup Service Elevation of Privilege Vulnerability

According to the CVSS metrics, successful exploitation of this vulnerability could lead to no loss of confidentiality (C:N) but have major impact on integrity (I:H) and on availability (A:H). What does that mean for this vulnerability?
This vulnerability does not allow disclosure of any confidential information, but could allow an attacker to delete data that could include data that results in the service being unavailable.

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
10.0.19045.2486 — https://support.microsoft.com/help/5022282
10.0.22621.1105 — https://support.microsoft.com/help/5022303
10.0.22000.1455 — https://support.microsoft.com/help/5022287
10.0.17763.3887 — https://support.microsoft.com/help/5022286
10.0.14393.5648 — https://support.microsoft.com/help/5022289
6.1.7601.26321 — https://support.microsoft.com/help/5022338
6.1.7601.26321 — https://support.microsoft.com/help/5022339
10.0.10240.19685 — https://support.microsoft.com/help/5022297