Education software provider PowerSchool says more than 33,000 Mainers have been affected by a data breach of its system.

The global K-12 software company suffered a cybersecurity breach last month and later announced it had discovered the attack.

Numerous school districts in Maine notified families of the breach, including districts in Cumberland, North Yarmouth, Yarmouth, Kennebunk, and Lewiston.

PowerSchool says 33,488 Maine residents were affected by the breach, which equals about 20 percent of the roughly 170,000 students enrolled in Maine schools.

The company filed a submission with the Maine Attorney General’s Office Monday, confirming the breach.

The submission included a letter with instructions for parents and guardians to try to protect their their children after the cyber attack.

The company admitted that sensitive information could have been accessed, including medical information and social security numbers.

“Due to differences in customer requirements, the types of information involved
in this incident included one or more of the following, which varied by person: name, contact information, date of birth, Social Security Number, limited medical alert information, and other related information,” the statement said.

It company’s letter also offers options for affected individuals to enroll in complimentary credit monitoring or identity protection for two years.

“PowerSchool is offering two years of complimentary identity protection services to students and educators whose information was involved.”