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ShinyHunters Turns Up the Heat on Ernst & Young After Tax Data Breach

Ernst & Young (EY) suffered a data breach between March 28 and April 12, in which hackers stole sensitive client information — including Social Security numbers, account numbers, and tax-related documents — from a third-party service management platform. The notorious extortion group ShinyHunters has since claimed responsibility, adding EY to its leak site and threatening to release the stolen data if the firm does not make contact by July 31. EY has not disclosed the number of affected individuals or confirmed the attacker's identity, but is offering impacted clients 24 months of free credit monitoring and identity protection services.

16 Aug 2026

EY Breach Exposes Client Tax Data Including SSNs and Card Numbers

Ernst & Young (EY) has begun notifying clients of a data breach involving a third-party service management platform used for tax-related work, with hackers gaining access between March 28 and April 12 after the incident was discovered on April 23. The compromised data includes sensitive personal and financial information such as names, addresses, Social Security numbers, and credit/debit card numbers. EY states it is unaware of any misuse of the data and is offering affected clients two years of free credit monitoring and identity protection services.

20 Jul 2026