France's civilian blood service said a cyberattack on a refrigeration supplier on Monday changed temperature settings at three plasma cold-storage sites, and that alarms and staff action meant no blood products were lost^2,3,4.

The French Blood Establishment, or EFS, said in a statement released late Tuesday that temperature and defrosting thresholds were raised to extremely high levels at the three sites^2,3.

Le Monde and Euronews reported the stored material as plasma bags for transfusions and plasma used to make medicines, which EFS said were transferred or otherwise secured^2,3.

EFS said monitoring and alarm systems flagged the anomalies quickly, that no health consequences had been identified, and that collection and distribution for hospitals continued^2,3.

The Register reported EFS as saying its own systems were not directly targeted and that some equipment was brought under control or taken out of service while products were moved to other rooms⁴.

That outlet also said public reports put attempted setpoints near 110 degrees Celsius from typical freezer settings around minus 30 degrees, while stressing that does not mean the rooms or contents reached the higher figure⁴.

France's national cybersecurity agency, ANSSI, and the Health Ministry are investigating, according to Euronews and The Register^3,4.

EFS did not name the supplier, The Register said, and none of the accounts identified who was behind the intrusion⁴.

Euronews placed the blood-service incident after a wave of reports that supermarket refrigeration in several European countries had been taken over remotely³.

Not medical advice.