American space systems face cyberattacks from China and other malign forces “with concerning regularity,” according to U.S. officials tasked with protecting satellites and other critical space infrastructure.

“Cyberthreats are things that happen all the time, not just from China but also nonstate actors,” a senior administration official told reporters Friday. “I can’t really talk about those at an unclassified level. Suffice to say that they do occur, and they occur with concerning regularity.”