A series of cyberattacks on Microsoft by state-sponsored hackers from China and Russia has led to significant security breaches, including the theft of emails from U.S. government officials. The U.S. Cyber Safety Review Board criticized Microsoft for a 'cascade of security failures' that allowed these breaches to occur. The board's findings highlight the gravity of the situation, with the Cybersecurity and Infrastructure Security Agency (CISA) declaring the theft of emails as presenting 'a grave and unacceptable risk' to U.S. federal agencies.