US officials are investigating potential national security risks tied to a telecom company founded in China whose internet routers are used by millions, multiple sources familiar with the matter told CNN.

Authorities are investigating TP-Link routers as a national-security threat. The company's routers are in 65% of American homes and small businesses, and its products are found in several government agencies.

The most popular home internet router brand in the US may be banned from sale in the country over fears that it represents a threat to national security.