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Chris Krebs, the former head of the Cybersecurity and Infrastructure Security Agency, said on Sunday the massive SolarWinds cybersecurity attack appears to be linked to Russia.
"Everything I've heard, whether it's from private sector cybersecurity threat and intelligence experts, things I have heard out of Congress – it's Russia," Krebs said on CNN's "State of The Union" Sunday.
Krebs warned that the scale of the cybersecurity breach was "probably more broad" than the hacking of SolarWinds, but said he would "be very careful about escalating" when asked if the US should retaliate.
Chris Krebs, former head of the Cybersecurity and Infrastructure Security Agency, said the massive SolarWinds cybersecurity attack appears to be linked to Russia, but the US should be cautious in its response.