Security
Government disputes claims of continued access as investigators measure damage
France’s tax authority has confirmed that an intruder accessed its systems and extracted data in June after an alleged cybercriminal advertised a purported database of 2 million taxpayers.
Using the alias “ZeroBytes,” the alleged crook behind the attack on the General Directorate of Public Finances (DGFiP) advertised the stolen database on a cybercrime forum on Wednesday.
They claimed the database contained details of more than 2 million French taxpayers and that they gained access using stolen credentials and an MFA bypass technique.
ZeroBytes also claimed to retain access to DGFiP’s systems and offered to sell it alongside the database.
DGFiP did not immediately answer our questions about the attacker’s claims. However, in a statement released Thursday, it disputed the claim that ZeroBytes retained access.
“On Wednesday, August 12, 2026, a malicious actor claimed unauthorized access to the information system of the French Public Finances Directorate, which occurred at the end of June 2026 following identity theft,” it said.
“Initial investigations confirm that this access, which had been severed at the end of June as part of an audit, nevertheless allowed the consultation and extraction of data concerning individuals and professionals.
“Following this complaint, the French Public Finances Directorate immediately implemented new restrictions to stop the unauthorized access and prevent further unauthorized use. In-depth investigations are ongoing to determine precisely which data and number of users were affected.”
DGFiP said it would report the attack to French data protection watchdog CNIL and notify affected users once it had determined who they were.
The intrusion is the latest in a string of security breaches affecting France’s public sector this year.
France’s Ministry of Finance, which oversees DGFiP, admitted in February that miscreants had accessed a database containing French citizens’ bank details.
The attackers used stolen credentials and made off with 1.2 million records, despite the ministry saying it quickly revoked their access.
A few weeks later, France’s Health Ministry confirmed a cyberattack on healthtech supplier Cegedim Santé in which around 15.8 million administrative files were stolen.
Around 165,000 of these contained doctors’ notes, which in “very limited cases” revealed medical histories.
In April, the Interior Ministry confirmed reports of an attack on France Titres, the government agency responsible for identity documents including passports and driver’s licenses.
The alleged culprit, reportedly a 15-year-old, advertised the stolen data online and claimed the breach affected between 18 million and 19 million people – more than a quarter of metropolitan France’s population.
In June, the department responsible for Tchap, France’s encrypted government messaging platform, investigated a suspected breach. The alleged attackers claimed to have accessed more than 73,000 user accounts, 643,000 messages, nearly 60,000 media files, and hundreds of chat rooms. ®
