Google translation of some of CNIL’s report:
The CNIL was informed by Viamedis and Almerys of the computer attack to which they were victims at the end of January. These operators, who manage third-party payment for complementary health insurance, saw the data necessary for their missions be compromised during this breach.
In total, this data leak concerns more than 33 million people. The data concerned are, for policyholders and their families, marital status, date of birth and social security number, the name of the health insurer as well as the guarantees of the contract taken out.
Data such as banking information, medical data, health reimbursements, postal details, telephone numbers or even emails would not be affected by the violation.
Read more at CNIL, the French data protection regulator.