2012 — Yahoo: Data breach reported, 500K records

2012 500.0K records affected

Technical writeup

Data breach reported. Reference: http://it.slashdot.org/story/12/07/12/1243217/nearly-half-a-million-yahoo-passwords-leaked-updated?utm_source=feedburnerGoogle+Reader&utm_medium=feed&utm_campaign=Feed%3A+Slashdot%2Fslashdot+%28Slashdot%29&utm_content=Google+Reader

Root cause

Hacked

References

http://it.slashdot.org/story/12/07/12/1243217/nearly-half-a-million-yahoo-passwords-leaked-updated?utm_source=feedburnerGoogle+Reader&utm_medium=feed&utm_campaign=Feed%3A+Slashdot%2Fslashdot+%28Slashdot%29&utm_content=Google+Reader