In a scathing indictment of Microsoft corporate security and transparency, a Biden administration-appointed review board issued a report Tuesday saying “a cascade of errors” by the tech giant let state-backed Chinese cyber operators break into email accounts of senior U.S. officials including Commerce Secretary Gina Raimondo.

The Cyber Safety Review Board, created in 2021 by executive order, describes shoddy cybersecurity practices, a lax corporate culture and a lack of sincerity about the company’s knowledge of the targeted breach, which affected multiple U.S. agencies that deal with China.

It concluded that “Microsoft’s security culture was inadequate and requires an overhaul” given the company’s ubiquity and critical role in the global technology ecosystem. Microsoft products “underpin essential services that support national security, the foundations of our economy, and public health and safety.”