The California firm is the largest provider of cloud-based education software for K-12 schools in the country, supporting more than 50 million students. PowerSchool, a leading education technology firm,

Parents and educators are receiving notifications about the breach, but it’s still unclear exactly how many people have been affected or what information was leaked.

In an FAQ obtained by TechCrunch, PowerSchool confirms it negotiated with the threat actors responsible for the breach.