Wi-Fi Giant’s US Future Hinges On Its Claimed Split From China

The ubiquitous but often overlooked Wi-Fi router lies at the heart of one of Washington’s biggest national security dilemmas — and a rift between two brothers on opposite sides of the Pacific.

US investigators are probing the China ties of TP-Link Systems Inc., the new American incarnation of a consumer Wi-Fi behemoth, following its rapid growth and a spate of cyber attacks by Chinese state-sponsored actors targeting many router brands. The inquiry is testing whether TP-Link’s corporate makeover represents enough of a divorce from China to spare it from a ban in a crucial market.

While TP-Link’s recent restructuring ...