Fears of Russia-linked cyberattacks, long a threat to businesses, gained new urgency when Russian soldiers launched a full-scale invasion of Ukraine last month. U.S. authorities have flagged the U.S. financial system, a central pillar in the U.S. sanctions regime, as an attractive target, and officials and security experts have warned for weeks about the possibility of retaliatory cyberattacks from Russia. Financial institutions' AI systems are uniquely exposed. "It's a huge unaccounted-for risk," said Andrew Burt, a former policy adviser to the head of the cyber division at the Federal Bureau of Investigation who now runs AI-focused law firm BNH. "The vulnerabilities of AI and complex analytic systems are significant and very widely overlooked by many of the organizations employing them."