The Information Commissioner's Office (ICO) has fined TalkTalk a record £400,000 for security flaws that allowed a cyber attacker to access customer data.
The attacker accessed the personal data of 156,959 customers including their names, addresses, dates of birth, phone numbers, and email addresses.
The attacker also got access to bank account information and sort codes in 15,656 cases.
"id": "TAL21458622",
"linkid": "talktalk",
"type": "Breach",
"date": "10/2016",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization's existence"