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CEO Nikesh Arora says legacy security systems can't handle AI-speed attacks, calling it a long-term growth driver for the industry

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Palo Alto Networks $PANW beat fiscal fourth-quarter estimates on Tuesday and issued a strong outlook for its new fiscal year, with CEO Nikesh Arora arguing that roughly $1 trillion in aging cybersecurity infrastructure must be replaced to defend against AI-powered threats.

"There's approximately $1 trillion of global cybersecurity debt that must be modernized to defend against automated threats because they operate instantaneously," Arora said on the company's earnings call. "Nothing that was deployed seven or 10 years ago is prepared or ready to handle AI at machine speed."