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EY Confirms Data Breach Exposing Goldman Sachs and Man Group Client Details via Checkmarx Vulnerability

EY has confirmed a data breach involving client documents accessed through a third-party technology services management platform used to support its tax operations. The unauthorized access occurred via a vulnerability in Checkmarx software and lasted from March 28 to April 12, with detection only on April 23. Exposed information included names, addresses, tax identification numbers, email addresses, and financial details belonging to clients in Goldman Sachs wealth management and the Man Group investment fund. Neither Goldman Sachs nor Man Group systems were compromised, confirming the exposure originated solely from EY's environment. The leaked materials consisted of attachments from support tickets rather than core system data. EY has engaged independent security firms, notified regulators in California, Texas, Massachusetts, and Vermont, and offered credit monitoring to affected individuals.