Avast

In May 2014, the Avast anti-virus forum was hacked and 423k member records were exposed online.

The Simple Machines Based forum included usernames, email addresses and password hashes of about 422,959 individuals.

Source: https://haveibeenpwned.com/PwnedWebsites#Avast

TPRM report: https://scoringcyber.rankiteo.com/company/avast

"id": "ava221624123",
"linkid": "avast",
"type": "Data Leak",
"date": "05/2014",
"severity": "60",
"impact": "3",
"explanation": "Attack with significant impact with internal employee data leaks"

{'affected_entities': [{'customers_affected': 422959,
                        'industry': 'Cybersecurity',
                        'name': 'Avast',
                        'type': 'Company'}],
 'data_breach': {'number_of_records_exposed': 422959,
                 'type_of_data_compromised': ['usernames',
                                              'email addresses',
                                              'password hashes']},
 'date_detected': '2014-05-01',
 'description': 'In May 2014, the Avast anti-virus forum was hacked and 423k '
                'member records were exposed online.',
 'impact': {'data_compromised': ['usernames',
                                 'email addresses',
                                 'password hashes'],
            'systems_affected': ['Forum']},
 'title': 'Avast Anti-Virus Forum Hack',
 'type': 'Data Breach'}