Heartland

The hackers used SQL injection, the most commonly exploited vulnerability to hacking the systems of Payment processing company Heartland’s system.

The intruders managed to bypass various antivirus packages and stole sensitive customer payment data from the firm.

The attack caused about $200 million to the firm.

Source: https://www.securitymagazine.com/articles/94114-notorious-cybersecurity-attacks-in-history-and-how-to-prevent-them

"id": "HEA214823222",
"linkid": "heartland-payment-systems",
"type": "Vulnerability",
"date": "01/2008",
"severity": "100",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"