Microsoft CEO Satya Nadella discussed the company's security challenges in a recent interview.MicrosoftMicrosoft CEO Satya Nadella called for a culture change amid the company's security challenges.The company has contended with the global CrowdStrike outage and vulnerability to Chinese hacks.Microsoft has accepted responsibility for security flaws, acknowledging breaches by hackers.Microsoft, the world's largest software maker, doesn't have the best track record regarding security.Microsoft CEO Satya Nadella says the company needs to change that.