Yesterday, Yahoo announced that the data breach it suffered in August 2013 was much broader than previously believed, affecting all three billion of its users. This announcement comes on the heels of a federal judge refusing to dismiss a consumer class action against the company. Our recent memorandum discussing that decision and other recent decisions involving data breach claims can be found here.
Additional information about the breach can be found on Yahoo’s public Q&A website on the topic: https://yahoo.com/security-update.