An unknown threat actor has stolen the sensitive personal, financial, and health information of nearly 870,000 Columbia University current and former students and employees after breaching the university's network in May.

Established in 1767 as King's College, Columbia University is a private Ivy League research university with a budget of $6.6 billion in 2024, over 20,000 employees, including 4,700 academic staff, and over 35,000 enrolled students across 19 schools and special programs.

The breach was discovered and reported to law enforcement authorities following an outage that affected some of its systems on June 24, following an investigation with support from external cybersecurity experts.

In notification letters filed with the office of Maine's Attorney General on Thursday, Au

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