French blood storage impacted by freezer hacks as theories swirl about culprits

What the report says

French authorities say cyber-attacks affected refrigeration equipment used to store donated blood at facilities linked to the French Blood Establishment (EFS), adding a new sector to a broader wave of freezer-related intrusions that had already hit supermarkets in several European countries. According to the BBC, the EFS said cold rooms were targeted and temperatures were set to rise, but staff intervened in time to protect supplies.

The organization said there was no identified health impact and no blood products were lost. The BBC reported that, until this latest disclosure, only supermarket systems were publicly known to have been affected. The incidents have prompted investigations across several countries, with cyber-security firms studying the attacks to help identify who is responsible.

Attribution remains unclear. The BBC said online speculation has focused on Russian hacktivist groups after some posted claims about hacking Danfoss, a company whose equipment appears to have been involved in the supermarket incidents. However, analysts cited by the BBC said other possibilities have not been ruled out, including Iranian-linked actors or even less sophisticated copycat activity.

Researchers said the pattern suggests planning and coordination, but no formal attribution has been made. The reporting adds context that the attacks appear to involve poorly protected internet-connected freezer controls, a reminder that basic industrial and medical infrastructure can be vulnerable when exposed online.