The Federal Communications Commission is investigating the use of a decades-old cellular network that could expose data to hackers, the agency announced.

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A Sunday report on the CBS program “60 Minutes” highlighted a vulnerability in the Signaling System 7 network, which is used by more than 800 telecom providers around the globe. Though they are switching to a more secure network known as “Diameter,” the transition is expected to take more than 10 years, and experts have said the network could be vulnerable to similar exploits.