2011 — Jefferson County: Around 6,500 ACT Explore test results for 8th…
Data compromised
Personal information
Technical writeup
Around 6,500 ACT Explore test results for 8th graders were mailed to incorrect addresses. The breach was discovered when parents began calling the district. Parents were asked to shred the tests. The exact cause of the mailing error is unknown.
Root cause
Unintended disclosure