A local elevation of privilege vulnerability exists in how splwow64.exe handles certain calls, aka 'Microsoft splwow64 Elevation of Privilege Vulnerability'.
https://www.tenable.com/cyber-exposure/2020-threat-landscape-retrospective
https://securelist.com/operation-powerfall-cve-2020-0986-and-variants/98329/
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0880