The Russians are not the only game in town when it comes to cyberwarfare, Acting Defense Secretary Patrick Shanahan said on Thursday amid revelations in the Mueller report about how Russian intelligence officers interfered with the 2016 presidential election.

Released on Thursday, a redacted copy of the report details how the GRU – Russian military intelligence – broke into government, company, and personal computers to steal a treasure trove of information that was used to smear Hillary Clinton.

But the U.S. government is not helpless against Russian hackers, said Shanahan, who has not read the Mueller report.

"The Russians present a risk," Shanahan told reporters on Thursday. "My job is to manage the risk. We have tremendous capability at Cyber Command and the NSA."