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French Tax Data Theft Using Stolen Staff Passwords Went Undetected for Seven Weeks

SourceThe Hacker News
StatusNews report
AddedSeptember 29, 2026
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Details
An attacker used stolen passwords of staff at France's tax administration to take tax data on hundreds of thousands of taxpayers and businesses in June and July. Neither the tax administration nor France's national cybersecurity agency saw the data leave. The attack was not sophisticated, the agency, ANSSI, says in a report (in French) published on Tuesday: it worked because of weak
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What is the French Tax Data Theft Using Stolen Staff Passwords Went Undetected for Seven Weeks incident?

An attacker used stolen passwords of staff at France's tax administration to take tax data on hundreds of thousands of taxpayers and businesses in June and July. Neither the tax administration nor France's national cybersecurity agency saw the data leave. The...

When did the incident happen?

This incident was disclosed on September 29, 2026.

What should I do if I was affected?

If you have an account with this organization, change your password and enable two-factor authentication. Be cautious of phishing emails, calls, or texts that reference this incident.

Read the full report on The Hacker News ↗
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