A cybersecurity incident altered the operating parameters of cold chambers at supervision and control installations in three regional sites of the Établissement français du sang (EFS) on Monday.

According to Le Canard Enchaîné, the chambers that store donor samples at -30 °C were set to 110 °C. The EFS said no health impact had been identified and that there were no blood product losses to report. Coolworld, the refrigeration company serving the EFS, said only a limited number of units were affected, through remote monitoring software that relied on a third-party component. The case came shortly after a wave of suspected attacks on supermarket refrigerators and freezers in a dozen European countries, France among them; it is not yet known whether the episodes are linked.