The National Security Agency has implanted software in nearly 100,000 computers around the world — but not in the United States — that allows the U.S. to conduct surveillance on those machines, The New York Times reported Tuesday.

The Times cited NSA documents, computer experts and U.S. officials in its report about the use of secret technology using radio waves to gain access to computers that other countries have tried to protect from spying or cyberattacks. The software network could also create a digital highway for launching cyberattacks, the Times reported.