Ernst & Young has revealed a significant data breach involving a third-party support ticket system. Hackers gained unauthorized access to the system, allowing them to view and download sensitive client tax documents. The breach highlights the vulnerabilities associated with relying on third-party services, as attackers were able to exploit weaknesses in the support system to access confidential data. Clients affected by this breach face potential risks including identity theft and financial fraud. Ernst & Young is currently investigating the incident and is working to enhance its security measures to prevent future occurrences. The firm has also begun notifying affected clients and is providing guidance on how to protect their information.