Charter Communications has confirmed a cybersecurity incident after the ransomware group ShinyHunters claimed responsibility for stealing millions of customer records through a vishing attack.

The telecommunications company acknowledged the breach following public claims made by the cybercriminal organization. ShinyHunters alleged they obtained access to customer data through vishing, a form of social engineering that uses voice communications to deceive victims into revealing sensitive information.

Charter has not disclosed the full scope of the incident, including how many customers may have been affected or what specific types of data were compromised. The company is investigating the breach and working with cybersecurity experts to assess the damage.

The incident adds Charter to a growing list of major companies targeted by ransomware groups in recent years. Vishing attacks have become increasingly sophisticated, with cybercriminals often impersonating legitimate company representatives to trick employees into providing access credentials or sensitive information.

Customers are being advised to monitor their accounts for suspicious activity and remain vigilant about potential identity theft or fraud attempts. Charter has not yet announced whether it will provide credit monitoring services or other assistance to affected customers.