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TL;DR
France’s national blood service, the EFS, says a cybersecurity incident affecting refrigeration controls at three sites was detected by its alarms and monitoring. The plasma was moved as a precaution, and the EFS reports no health impact or loss of blood products; the widely reported 110 °C figure was a controller setting, not a measured temperature.
France’s national blood service, the Établissement français du sang (EFS), says a cybersecurity incident affecting cold-room supervision and control systems at three sites was detected overnight November 1–2, allowing staff to move stored plasma as a precaution. The EFS reports no health impact and no loss of blood products; a reported 110 °C was a controller setting, not a measured room temperature.
In a statement issued November 3, the EFS said a refrigeration equipment contractor had experienced a cybersecurity incident affecting the supervision and control installations of cold rooms at three EFS sites. The service said temperature and defrost thresholds had been raised to very high levels, but its statement did not specify a temperature. It did not name the contractor or identify two of the sites.
According to the EFS, its monitoring and alarm systems identified the anomalies quickly. The affected equipment was brought under control or switched off, and products were transferred to other installations as a precaution. The rooms held frozen plasma for transfusions and plasma intended for fractionation, a process used to make medicines. EFS president Frédéric Pacoud told BFMTV on November 4 that products could have been lost if the situation had not been detected, while saying their safety was not affected.
The figure 110 °C came from reporting by the French satirical weekly Le Canard enchaîné, which said rooms intended to operate at −30 °C had been programmed to that setting. No source cited in the supplied reporting says a room actually reached 110 °C. The EFS said its technical teams were working with France’s national cybersecurity agency, ANSSI, and the health ministry, and that temperature monitoring across its equipment had been stepped up.
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
Frozen plasma is used in patient transfusions and in the production of medicines, so a loss of temperature control can put supplies at risk. European guidance summarized by the International Society of Blood Transfusion says fresh frozen plasma should be stored at −25 °C or colder. The number entered into the controller is not evidence that products thawed, but a sustained rise above required storage conditions could require products to be assessed or discarded.
The EFS says alarms and staff response contained the incident before any reported product loss or health impact. That account makes the episode a reminder that remote maintenance access can affect physical equipment, while independent monitoring and a plan to move stock can limit the consequences. The statement does not establish how the system was accessed or whether the incident involved a wider campaign.
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A Blood-Service Incident Amid Refrigeration Attacks
The EFS is France’s national blood service, collecting donations and supplying hospitals. The contractor’s identity has not been confirmed by the EFS. Le Canard enchaîné named Coolworld, a refrigeration room and container rental and maintenance company, but that identification comes from the publication’s reporting; Coolworld had not commented publicly in the material provided.
The blood-service incident occurred on the same night as a second wave of attacks on supermarket refrigeration systems across Europe. The source material says supermarket incidents affected at least 11 countries and involved manipulated refrigeration controls or defrost settings. 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 is unverified, the posts were deleted, and no government attribution was reported. Those claims do not establish who was behind the blood-service incident.
The 110 °C figure has also been described inaccurately online as a temperature that the plasma reached or as evidence that it was “boiled.” Reporting cited in the source material identifies it as a programmed setpoint. The actual temperature reached in the EFS rooms has not been made public.
““The EFS monitoring and alarm systems made it possible to identify these anomalies quickly.””
— Établissement français du sang, statement issued November 3
The Intrusion’s Scope Is Not Public
The EFS has not publicly named the refrigeration contractor, disclosed the two other affected locations, or explained how the remote system was accessed. The figure 110 °C is attributed to Le Canard enchaîné; it was not included in the EFS statement, which described the thresholds only as very high. The actual temperature reached, how long the settings were altered, and whether any products required individual testing or review have not been specified in the material provided.
The EFS reports no product loss and no health impact. It is not clear whether investigators have identified a perpetrator, whether other systems were accessed, or whether this event was connected to the supermarket refrigeration incidents that occurred the same night. The claims by groups about the supermarket attacks remain unverified and do not establish responsibility for the EFS incident.
Cybersecurity Review and Temperature Checks
The EFS said technical teams were working with ANSSI and the health ministry and that it had increased temperature monitoring across its equipment. The next public developments may clarify the contractor, affected sites, access method and duration of the incident, as well as whether the investigation found any further effects on stored products.
No timetable for a final investigation report or further EFS announcement was provided in the source material. Until more information is released, the confirmed account remains that alarms detected abnormal settings, staff moved the plasma, and the EFS reported no health impact or loss of blood products.
Key Questions
Did the plasma reach 110 °C?
No such measured temperature has been reported. The 110 °C figure refers to a controller setting reported by Le Canard enchaîné, not a confirmed temperature in the cold room.
Were patients or blood products harmed?
The EFS said no health impact was identified and no blood products were lost. It said the stored plasma was moved to other installations as a precaution.
How many EFS sites were affected?
The EFS confirmed that cold-room control installations at three sites were affected. The service has not publicly named all three locations; Bourgogne-Franche-Comté was identified in reporting attributed to Le Canard enchaîné.
Who carried out the intrusion?
The person or group responsible has not been identified publicly in the supplied reporting. The EFS did not name its refrigeration contractor, and no authority has linked the incident to the separate supermarket attacks.
What is the EFS doing now?
The EFS said its technical teams were working with ANSSI and the health ministry and that temperature monitoring had been increased across its equipment. It has not announced a timetable for further findings.
Source: ThorstenMeyerAI.com
