Horizon Media Data Breach Exposes Sensitive Personal Information
Horizon Media, the world’s largest independent media agency according to COMvergence data, recently disclosed a data breach compromising sensitive consumer information. The exposed data includes Social Security numbers, government ID numbers, and health records, though the total number of affected individuals has not been publicly released.
Affected individuals may receive direct notifications from Horizon Media outlining available protective services. Those whose driver’s license or state ID numbers were exposed are advised to contact their state’s Department of Motor Vehicles to request a replacement with a new number. Additionally, monitoring credit reports via AnnualCreditReport.com and reviewing health insurance statements for unauthorized charges is recommended.
To mitigate risks, impacted individuals can place fraud alerts or credit freezes with major credit bureaus Equifax (1-800-525-6285), Experian (1-888-397-3742), and TransUnion (1-800-680-7289) and request an IRS Identity Protection PIN to prevent fraudulent tax filings. Scammers may exploit the breach through phishing attempts, so caution is advised regarding unsolicited communications referencing Horizon Media.
The company has not yet detailed its full response to the incident, but affected parties should watch for official correspondence. Further updates may follow as more information becomes available.
Source: https://www.claimdepot.com/data-breach/horizon-media-2026
Horizon Media cybersecurity rating report: https://www.rankiteo.com/company/horizon-media
"id": "HOR1778106607",
"linkid": "horizon-media",
"type": "Breach",
"date": "3/2026",
"severity": "85",
"impact": "4",
"explanation": "Attack with significant impact with customers data leaks"{'affected_entities': [{'industry': 'Advertising/Media',
'name': 'Horizon Media',
'size': 'World’s largest independent media agency',
'type': 'Media Agency'}],
'customer_advisories': 'Affected individuals may receive direct notifications '
'from Horizon Media outlining available protective '
'services.',
'data_breach': {'personally_identifiable_information': 'Yes',
'sensitivity_of_data': 'High',
'type_of_data_compromised': ['Social Security numbers',
'Government ID numbers',
'Health records']},
'description': 'Horizon Media, the world’s largest independent media agency, '
'recently disclosed a data breach compromising sensitive '
'consumer information, including Social Security numbers, '
'government ID numbers, and health records. The total number '
'of affected individuals has not been publicly released.',
'impact': {'data_compromised': 'Sensitive personal information (Social '
'Security numbers, government ID numbers, '
'health records)',
'identity_theft_risk': 'High'},
'recommendations': ['Contact state’s Department of Motor Vehicles for ID '
'replacement if driver’s license or state ID was exposed',
'Monitor credit reports via AnnualCreditReport.com',
'Review health insurance statements for unauthorized '
'charges',
'Place fraud alerts or credit freezes with major credit '
'bureaus (Equifax, Experian, TransUnion)',
'Request an IRS Identity Protection PIN to prevent '
'fraudulent tax filings',
'Be cautious of phishing attempts'],
'response': {'communication_strategy': 'Direct notifications to affected '
'individuals'},
'title': 'Horizon Media Data Breach Exposes Sensitive Personal Information',
'type': 'Data Breach'}