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TL;DR
France’s national blood service, the EFS, said a cybersecurity incident involving a refrigeration contractor affected cold-room control systems at three sites overnight from Nov. 1 to 2. A report by Le Canard enchaîné says controllers were set to 110 °C, but that was a programmed target, not a measured temperature; EFS says alarms led staff to move plasma and no health impact or product loss was reported.
France’s national blood service said a cybersecurity incident involving a refrigeration contractor affected cold-room supervision and control systems at three EFS sites overnight from Nov. 1 to 2, prompting staff to move stored plasma as a precaution. The EFS reported no health impact and no loss of blood products; a reported 110 °C setting was a controller target, not a temperature recorded inside a room.
In a statement issued Nov. 3 and quoted by franceinfo and Next, the Établissement français du sang (EFS) said a contractor had been the victim of a cybersecurity incident. It said the affected systems supervised and controlled cold rooms at three sites, where temperature and defrost thresholds had been raised to “very high temperatures.” The EFS did not identify the contractor or specify a temperature in its statement.
Le Canard enchaîné reported that the rooms were programmed from their usual target of about −30 °C to +110 °C, and named refrigeration company Coolworld as the contractor. That identification and temperature figure are attributed to the newspaper’s reporting; Coolworld had not commented publicly in the material available. The EFS said it was not directly targeted.
The EFS said its monitoring and alarm systems identified the anomalies quickly. Equipment was controlled or switched off, and the contents were moved to other installations as a precaution. The rooms contained frozen plasma for transfusion and plasma intended for fractionation, a process used to make medicines. EFS said it had identified no health impact and no loss of blood products. Its technical teams were working with France’s national cybersecurity agency, ANSSI, and the health ministry, while temperature monitoring across EFS equipment was increased.
Infographic 01 · 110 °C, explained
A setting, not a temperature
Someone raised the targets of plasma cold rooms at France’s blood service to +110 °C. The rooms never got there. What mattered was the alarm.
Frozen plasma has to stay at or below this line. The danger was thawing, not boiling. A few degrees too warm can already mean discarding bags.
- +110 °CThe programmed setpointTyped into the controller (Canard). Never reached, never measured.
- ~+50 °CHottest reported in the supermarket waveDefrost heaters forced on, same night (AFP, ZDFheute)
- −25 °CThe line that mattersFrozen plasma is stored at −25 °C or colder (EDQM guide via ISBT)
- −30 °CNormal operation of the EFS cold roomsAs reported by Le Canard enchaîné
Why the alarm won
- DetectionEFS monitoring and alarms flagged the anomaly quickly (EFS)
- A person on callAn on-call technician saw the temperature rise in the night (Canard)
- A plan BThe plasma was moved to other installations as a precaution (EFS)
Sources: EFS communiqué, 3 Nov 2026, via franceinfo · Le Canard enchaîné, as reported by Solutions Numériques · ISBT, citing the EDQM Guide · AFP via Al Jazeera, 4 Nov · ZDFheute, 3 Nov. The 110 °C and −30 °C figures come only from Le Canard enchaîné; the EFS gives no number.
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Why Plasma Temperature Controls Matter
The incident involved products that must remain frozen to preserve their suitability for clinical use. Fresh frozen plasma is stored at −25 °C or colder, according to European guidance from the EDQM as summarized by the International Society of Blood Transfusion. A sustained rise beyond safe limits could put stored products at risk, even though the EFS says that did not happen in this case.
The response also shows why cold-chain safety depends on more than the cooling controller alone. The EFS said monitoring and alarms detected the changes, an on-call technician responded, and staff moved stock. Those layers helped prevent a reported loss of products. The event is a warning for operators of medical and food cold storage, but the available reporting does not establish that the blood-service incident was part of a wider coordinated operation.
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The 110 °C Figure Explained
The number that drew attention online was a programmed setpoint, not a reading from a thermometer. No source in the supplied reporting says a plasma room reached 110 °C. A refrigeration room is not an oven, and its actual temperature depends on its equipment, surrounding conditions and how long a control change remains in effect. The EFS statement itself referred only to thresholds raised to very high temperatures.
The blood-service incident occurred on the same night as a reported second wave of attacks affecting supermarket refrigeration in at least 11 European countries. In those cases, reports described systems forced into defrost cycles and some measured temperatures reaching about 50 °C. The overlap in timing is confirmed in the source material, but no authority has linked the supermarket attacks to the EFS incident. Two groups describing themselves as pro-Russian claimed the supermarket attacks in a video, but the claim was unverified, the posts were deleted, and no government attribution was reported.
““The EFS monitoring and alarm systems made it possible to identify these anomalies quickly.””
— Établissement français du sang
What Investigators Have Not Disclosed
The EFS has not publicly named the contractor, identified the three affected sites, or provided the exact settings and temperature histories in its statement. Le Canard enchaîné named Coolworld and reported the 110 °C target; those details have not been confirmed in the EFS statement. The available information does not say how the attacker accessed the contractor’s system, how long the control changes remained active, or whether data were accessed or stolen.
It is also not clear whether the incident was connected to the supermarket refrigeration attacks reported on the same night. The online claims concerning those attacks remain unverified, and no government attribution was reported. The EFS’s statement that no product was lost is the service’s account; further technical findings have not been provided in the source material.
EFS Review and Monitoring Continue
The EFS said its technical teams were working with ANSSI and the health ministry and that temperature monitoring across its equipment had been stepped up. The source material does not give a timetable for the technical investigation or say when further findings will be released.
Further details from the investigation could clarify how the contractor’s systems were reached, which controls were affected and whether changes to remote maintenance access or alarm arrangements are planned. Until then, the confirmed public account remains that alarms detected the anomalies, staff moved the plasma, and the EFS reported no health impact or product loss.
Key Questions
Did a plasma freezer actually reach 110 °C?
No measured temperature of 110 °C has been reported. Le Canard enchaîné said controllers were programmed to that target; the EFS described thresholds raised to very high temperatures without giving a number.Was any plasma lost or did anyone suffer a health impact?
The EFS reported no health impact and no loss of blood products. It said the contents were moved to other installations as a precaution.How many EFS sites were affected?
The EFS said cold-room control systems at three sites were affected. It has not publicly identified all three locations in the source material.Was this connected to the supermarket refrigeration attacks?
No link has been established. The incidents occurred on the same night, but the source material says no authority has connected them.Source: ThorstenMeyerAI.com
