"…the app can potentially collect information on users in the US. Though many people in the US are more aware of cybersecurity than ever before and have taken steps to limit their susceptibility to this kind of spying, many still don’t understand how VPNs work or simply how much information they are sharing online.
Of particular concern is that military and governmental personnel also use the app, and this could provide the Chinese government with a “back door” for more sophisticated surveillance."
https://www.infosecurity-magazine.com/opinions/tiktok-cybersecurity-threat/
