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An "Ethical Hacker" Stole Millions of People's Data From Medical Companies. "Analysis Suggests It's Someone From Poland."

Summary
The Fingerprint hacker, who is believed to be responsible for the leak of PESEL numbers from the MyDr and Fakturownia websites, has no intention of selling the stolen data. He has pledged to help the attacked companies improve their security and is expected to remain in constant contact with CERT Polska. The authorities suspect he is Polish.
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4 Articles

The FELG system for dental offices has fallen victim to a cyberattack, the e-Health Center team reported on Friday. The incident is currently being monitored by services and institutions, including CSIRT CeZ. According to reports from Sekurak and Niebezpiecznik, 2.4 million patient records may have been leaked.

The perpetrators of another cyberattack are demanding a ransom in exchange for the non-disclosure of data on over 2 million patients. They are also threatening doctors, claiming they are prepared to disclose the data of dentists who prescribed "psychotropic medications/stimulants." The data was stolen through dental office software.

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Dental practice software provider FELG Dent has fallen victim to a hacker attack. According to Niebezpiecznik, the criminals took over sensitive patient and doctor data and demanded a ransom to keep the database private.

·Poland
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Hackers have contacted INNPoland claiming to have breached the FELG Dent system used by dental practices. They have leaked information about 2.4 million patients and 1.2 million prescriptions, including PESEL numbers, addresses, and phone numbers. FELG Dent confirmed the cyberattack and the ransom demand, but offers a different story regarding the perpetrators and the scale of the breach.

·Poland
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INNPoland.pl broke the news in Poland on Friday, October 2, 2026.
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