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France’s tax authority admits hackers made off with data on 678,000 individuals

An attacker used stolen credentials and an MFA bypass to steal tax data on 678,000 individuals from France's tax authority DGFiP.

France's General Directorate of Public Finances (DGFiP) disclosed that intrusions into its portals exposed tax data, including reference tax income, family quotient, withholding tax rate, and business identifiers such as company name and SIREN number, on 678,000 individuals and professionals. An attacker using the alias 'ZeroBytes' claimed credit on a cybercrime forum and offered a stolen database for sale, claiming the portal contains data on roughly 20 million citizens. DGFiP suspended the affected accounts, notified the CNIL, and is working with ANSSI and the finance ministry's security office; it said the main online tax portals and their login credentials were not compromised.

Help Net Security · Aug 17, 2026Data breach

France investigates tax authority breach after hacker claims 600,000 victims

France's tax authority DGFiP confirmed hackers extracted data on individuals and businesses; a hacker claims more than 600,000 victims.

France's Economy Ministry said an attacker gained unauthorized access to DGFiP systems in late June by stealing or misusing someone's identity, viewed and extracted data, and was cut off after detection. A hacker using the alias ZeroBytes claimed via FrenchBreaches to have taken data on over 600,000 people, including names, tax identification numbers, emails, family circumstances and tax status; the claim is unverified. The DGFiP will notify affected individuals, report to France's data protection authority and file a criminal complaint. It follows other 2026 breaches at ANTS, the Education Ministry and the National Bank Accounts File.

The Record · Aug 14, 2026Data breach in the wild

Sophisticated Cyberattack Exposes Data of 678,000 French Taxpayers

Hackers stole personal and tax data of 678,000 individuals and businesses from France's tax agency DGFiP, prompting a Paris criminal investigation.

France's Directorate-General for Public Finances (DGFiP) confirmed a sophisticated cyberattack exposed data on 678,000 users of the tax system, including income figures, tax rates and family circumstances for individuals and SIREN registration data for businesses. The Paris prosecutor's cybercrime unit opened a probe and referred it to the French anti-fraud office OFAC after a threat actor claimed the breach in late June. Officials stressed the stolen data does not grant access to secure accounts on impots.gouv.fr, and taxpayer notification begins Monday with warnings about identity theft and fraudulent follow-up requests. The incident follows recent breaches at the ANTS documents agency and the INSEE statistics authority.

Security Affairs · Aug 16, 2026Data breach