U.S. 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.Related video above: Cybersecurity expert explains why TikTok poses a real threatU.S. officials are concerned that cheap and ubiquitous routers made by TP-Link could offer a foothold for China-backed hackers into U.S. infrastructure, the sources said.The Commerce Department has opened a probe into the company that is in its nascent stages. One possible outcome of the probe is a ban on the sale of TP-Link routers in the U.S., two of the sources, said.It’s just one of a flurry of actions the Biden administration has taken in its waning days that officials say are aimed at blunting China’s ability to hack the American telecoms sector. The actions will carry into the Trump administration as it inherits the steep challenge of …