Tessco Data Breach: Cybercriminals Claim Theft of 615GB of Sensitive Data
On April 20, 2026, wireless connectivity product distributor Tessco reportedly fell victim to a cyberattack, with the ransomware group PayoutsKing later claiming responsibility. According to a post on the dark web monitoring site Ransomware.Live, the breach involved the exfiltration and encryption of 615GB of data, including highly sensitive information.
The compromised data is said to include:
- Personal details (names, addresses, phone numbers, email addresses, birthdates, and Social Security numbers) of over 100,000 individuals
- Salesforce records for more than 500,000 customers
- Corporate data, though specifics remain undisclosed
As of May 14, 2026, Tessco has not officially confirmed the breach. However, legal investigations are underway, with attorneys exploring the possibility of a class action lawsuit on behalf of affected customers and employees. The potential lawsuit aims to address damages such as loss of privacy, financial costs, and time spent mitigating the breach’s impact.
The incident underscores the growing threat of ransomware attacks targeting corporate and customer data, with cybercriminals increasingly leveraging stolen information for extortion or further exploitation. Further details may emerge as investigations progress.
Source: https://www.classaction.org/data-breach-lawsuits/tessco-april-2026
Tessco LLC cybersecurity rating report: https://www.rankiteo.com/company/tessco-technologies
"id": "TES1779834324",
"linkid": "tessco-technologies",
"type": "Ransomware",
"date": "4/2026",
"severity": "100",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'customers_affected': '500,000+ (Salesforce records), '
'100,000+ (personal details)',
'industry': 'Wireless Connectivity Products',
'name': 'Tessco',
'type': 'Corporation'}],
'data_breach': {'data_encryption': 'Yes',
'data_exfiltration': 'Yes',
'number_of_records_exposed': '600,000+',
'personally_identifiable_information': ['Names',
'Addresses',
'Phone numbers',
'Email addresses',
'Birthdates',
'Social Security '
'numbers'],
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Personal details',
'Salesforce records',
'Corporate data']},
'date_detected': '2026-04-20',
'date_publicly_disclosed': '2026-05-14',
'description': 'Wireless connectivity product distributor Tessco reportedly '
'fell victim to a cyberattack, with the ransomware group '
'PayoutsKing later claiming responsibility. The breach '
'involved the exfiltration and encryption of 615GB of data, '
'including highly sensitive information such as personal '
'details, Salesforce records, and corporate data.',
'impact': {'brand_reputation_impact': 'Potential reputational damage',
'data_compromised': '615GB',
'identity_theft_risk': 'High',
'legal_liabilities': 'Potential class action lawsuit'},
'investigation_status': 'Ongoing',
'motivation': 'Extortion, Data Exploitation',
'ransomware': {'data_encryption': 'Yes',
'data_exfiltration': 'Yes',
'ransomware_strain': 'PayoutsKing'},
'references': [{'date_accessed': '2026-05-14', 'source': 'Ransomware.Live'}],
'regulatory_compliance': {'legal_actions': 'Potential class action lawsuit'},
'response': {'communication_strategy': 'No official confirmation as of May '
'14, 2026'},
'threat_actor': 'PayoutsKing',
'title': 'Tessco Data Breach: Cybercriminals Claim Theft of 615GB of '
'Sensitive Data',
'type': 'Data Breach, Ransomware'}