UK utility giant Southern Water says hackers stole personal data of hundreds of thousands of customers

Southern Water disclosed a January cyberattack claimed by the Black Basta ransomware group that may have exposed personal data of between ~235,000 and 470,000 customers (including dates of birth, national insurance numbers and bank details) and employee records; the gang claimed to have stolen ~750 GB of data and briefly listed the victim on its leak site, while Southern Water has notified the ICO and is working with cybersecurity experts.