The European Telecommunications Standards Institute (ETSI) revealed that hackers breached its IT system dedicated to its members’ work and stole a database containing information on its users.

ETSI is an independent, not-for-profit, standardization organization in the field of information and communications based in the Sophia Antipolis technology park in the French Riviera. ETSI supports the development and testing of global technical standards for ICT-enabled systems, applications and services such as GSM, TETRA, 3G, 4G, 5G, and DECT. The non-profit has more than 900 member organizations worldwide from 65 countries.

The organization said it fixed a vulnerability used by the attackers but didn’t provide additional details regarding the security incident. ETSI said it informed France’s cybersecurity agency ANSSI about the attack and requested assistance in investigating and restoring the information systems.

The organization has undertaken additional security actions and significantly strengthened its IT security procedures. It has also asked its online services users to change their passwords.