France’s Massive Tax Data Breach Puts 678,000 People at Risk as Crypto Attacks Soar

TL;DR
- France’s tax authority suffered a breach reportedly exposing data linked to 678,437 people, including thousands with high declared incomes.
- The leaked information could make wealthy individuals easier to identify for fraud, extortion or physical attacks, although the database does not identify crypto ownership.
- France recorded 33 verified wrench attacks in the first half of 2026, the highest national total in CertiK’s dataset, while security experts continue urging users to minimize exposed personal data.
France is facing a fresh data-security concern after a cyberattack on the General Directorate of Public Finances reportedly exposed personal and financial information tied to hundreds of thousands of taxpayers. The incident has drawn attention in crypto circles because detailed identity and income data can become valuable intelligence for criminals targeting people who may hold digital assets.
French reporting on the incident put the affected population at 678,437 people, although the final scope remains under investigation. The compromised information reportedly includes names, dates of birth, addresses, telephone numbers, email addresses and tax-related details. Nearly 27,000 affected individuals reportedly declared at least €100,000 in income, while 386 reported more than €1 million and eight exceeded €10 million.
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