Researchers at McAfee recently discovered code execution vulnerabilities in the default settings of the Cortana voice-activated digital assistant in Windows 10 systems. 
Steve Povolny is head of advanced threat research at McAfee and he shares their findings.
The research can be found here:
https://securingtomorrow.mcafee.com/mcafee-labs/want-to-break-into-a-locked-windows-10-device-ask-cortana-cve-2018-8140