2011 — State of Texas: 3, 3.5M records

2011 3.5M records affected

Technical writeup

3.5 million records were accidentally published online including people's names, mailing addresses, social security numbers, and in some cases dates of birth and driver's license numbers.

Root cause

Accidentally published

References

http://www.informationweek.com/security/attacks/texas-data-breach-exposed-35-million-rec/229401489?queryText=Texas%20data%20leak