It may not look like it given Equifax's (EFX) major hack,, but cyber security is a priority among major companies, according to PwC's Matthew Lieberman.

"It's a really high priority for most companies," said Lieberman, referencing a recent PwC survey showing some 90% of CEOs are concerned about hacks. "I think the challenges are that changes are coming so quickly and it's hard to be preventative."

On Tuesday, Equifax CEO Richard Smith announced his retirement, as the controversy over the hack loomed in the background. 

Equifax shares are down 11% since the start of the year. 

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