#7 Amazon owned Zappos targeted

Zappos.com, the online shoe retailer owned by Amazon.com, got its internal network infiltrated by a cyber attacker.

More than 24 million customers personal information including: customers' names, e-mail addresses, billing and shipping addresses, phone numbers and the last four digits of customers’ credit card numbers were at hackers’ mercy.

However, database that stores customers' critical credit card and other payment data was not affected or accessed.

#6 Microsoft Internet Explorer

Internet Explorer got vulnerable to hackers when a security hole which was discovered in September. The hackers targeted some of the users by installing malicious software on Windows systems and had accessed personal.

The attacks prompted the German government and security experts to urge people to temporarily stop using the browser, reported IBN Live. 

However Microsoft acted fast and fixed a security bug in Internet Explorer.

#5 Global Data Inc (Visa and Master Card)

Hackers breached data card processing systems and were successful in getting 1.5 million card numbers. However names, addresses and other data which could have led to massive money drain out, was not stolen. It was a very narrow escape.