France says hackers breached DGFiP tax systems and may have stolen data on hundreds of thousands of people and businesses

France’s tax authority says hackers got into its systems and copied data belonging to individuals and businesses. The Economy Ministry said the intrusion hit the Directorate General of Public Finances (DGFiP) in late June after someone’s identity was stolen or misused, letting the attacker access internal systems and extract data. A hacker using the name ZeroBytes claims more than 600,000 records were taken, including names, tax IDs, email addresses, family details, and tax-status information, though that scope has not been independently verified.
Why it matters: Tax-agency data can be used for identity theft, tax fraud, and highly convincing phishing or impersonation attacks. People and businesses notified by DGFiP should watch for scams, review tax-related accounts and correspondence, and treat unsolicited messages referencing tax details with extra caution.

Sources

French tax authority says break-in exposed data of 600K, including some private messages
2026.08.20 98% relevant
This directly updates the same DGFiP breach by refining the affected count to about 600,000, specifying that slightly more than 350,000 individuals and about 250,000 businesses or professionals were affected, and adding that message lists and the full contents of about 250 taxpayer messages may have been stolen.
680,000 Impacted by French Tax Authority Data Breach
Ionut Arghire 2026.08.17 98% relevant
This article updates the same DGFiP breach with a firmer impact figure of about 678,000 affected individuals and added detail that attackers used compromised employee and third-party credentials to access systems in June and July and steal tax, company, and cadastral data.
French tax authority data breach affects 678,000 individuals
Sergiu Gatlan 2026.08.17 98% relevant
This directly updates the same DGFiP breach, adding the confirmed impact count of 678,000 individuals and professionals, the types of data accessed and extracted, the forum sale claim by ZeroBytes, and the French ministry's response and notification plans.
French tax authority admits data heist after crook touts 2M records
2026.08.14 98% relevant
This article updates the same DGFiP breach with more concrete details: the intrusion happened in late June, the alleged seller 'ZeroBytes' claimed about 2 million taxpayer records, said stolen credentials and an MFA-bypass technique were used, and DGFiP said the access had been cut off by the end of June and disputed the claim of ongoing access.
France investigates tax authority breach after hacker claims 600,000 victims
2026.08.14 100% relevant
This article appears to be the initial disclosed story about the late-June breach of France’s Directorate General of Public Finances, with official confirmation of unauthorized access and data extraction.
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