Database of "Acer" has been hacked! CC Details of 30K Customers stolen by hackers!

Taiwan based IT company "Acer" revealed an incident that their database located in United States has been breached by hackers. According to Acer, Credit Card details and personal information of more than 30,000 users have been stolen by hackers. Due to a major security issue, the database of Acer's online store was in the hands of hackers. All this has been revealed by Acer, in front of California's Attorney General.
Which Users are affected from this data breach?
All the users of Acer's online store are not affected from this data breach. The credentials of that users have been stolen by hackers who have purchased something from Acer's online store between "May 2015 - April 2016". Stolen data includes Credit Card Numbers, names of customers, residential addresses of customers, expiry dates of cards and three digit CVV codes of cards. Social Security Numbers are safe because it was located on another server. According to security firm ZDnet, affected customers belongs to Canada, Puerto Rico and United States. If you are one from these users, contact Acer or visit your local Attorney General's Office of US Federal Trade Commission.
How it Happened?
The main reason behind this data breach is not clear yet. The security team of Acer said that an unspecified vulnerability has been exploited by hackers by using advance techniques. Security expert are investigating this case and finding foot prints of hackers. Acer is informing all its affected users by sending a letter about this incident. They wrote, "Due to an unauthorized access of third party, the credit card details of some Acer's online store users is at risk. We are taking immediate steps for the security of your cards. We are taking help from the best security experts."
Acer also said its users, "If you found that someone is misusing your information, you can file a report against the suspected. If you are getting any type of problem, you can visit US Federal Trade Commission's Attorney General's Office. A notice has already been sent by Acer to its third party payment gateway vendor regarding this breach.