Windows Text Services Framework Elevation of Privilege Vulnerability

What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker could use this vulnerability to elevate privileges from a Low Integrity Level in a contained ("sandboxed") execution environment to a Medium Integrity Level or a High Integrity Level.
Please refer to AppContainer isolation and Mandatory Integrity Control for more information.

According to the CVSS metric, 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 AppContainer. The attacker could elevate their privileges and execute code or access resources at a higher integrity level than that of the AppContainer execution environment.

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