Dell is aware of this Realtek security vulnerability (CVE-2019-19705). We are working with our suppliers to understand the impact and will communicate any necessary security updates or mitigations as they become available on our Security Advisories and Notices website. Because most of these updates apply to Windows 10, posting in this board is applicable. The Virus & Spyware board could also be applicable.
Hello.  I wish there was a Security Software section of this Dell forum where I can report this. Earlier this year in 2020, Realtek posted this vulnerability report on their web site concerning Realtek HD Audio drivers for Windows. There's also this report from SafeBreach about the potential security vulnerability with the Realtek audio drivers. I think Dell needs to be aware of this issue and perhaps get in touch with Realtek to obtain updated Realtek audio drivers for affected Dell computers using Windows 10.
Realtek HD Audio Driver Security Vulnerability CVE-2019-19705