2009 — Comcast: A list of over 8,000 Comcast user names and…
Data compromised
Personal information
Technical writeup
A list of over 8,000 Comcast user names and passwords were available to the public via Scribd for two months, before a Wilkes University professor discovered it over the weekend after doing a search for his identity online. Comcast is saying it looks like the result of a phishing scam and isn't an inside job, and that there are so many duplicate entries on the list that it's closer to 4,000 customers who were exposed.
Root cause
Unintended disclosure