The interlock ransomware group listed Clarksville ISD on its data leak site on 2025-12-18. Country: US Sector: Education Domains named: clarksvilleisd.net Claim as published on the leak site: Once again, we see how a certain school organization, Clarksville ISD, was attacked and compromised due to the negligence and irresponsibility of employees with other people's data, that is, other people, as a result of which a large amount of confidential data was compromised, including the SNN of all students for the entire year, as well as all employee data, including SNN, banking transactions, and financial components.