An elevation of privilege vulnerability exists in the way the Task Scheduler Service validates certain file operations, aka 'Task Scheduler Elevation of Privilege Vulnerability'.
https://www.tenable.com/blog/tenable-roundup-for-microsofts-june-2019-patch-tuesday
https://www.kb.cert.org/vuls/id/119704
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1069
https://blog.0patch.com/2019/06/another-task-scheduler-0day-another.html