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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 on Nov. 1-2. A reported 110°C figure was a controller setting, not a measured room temperature; alarms prompted staff to move plasma, and the EFS reported no product loss or health impact.
France’s national blood service said a cybersecurity incident involving a refrigeration contractor affected cold-room monitoring and control systems at three EFS sites overnight from Nov. 1 to Nov. 2, 2026. The EFS said alarms detected the abnormal settings, staff moved the stored plasma as a precaution, and no health impact or loss of blood products was reported.
In a statement issued Nov. 3, the Établissement français du sang (EFS) said a contractor responsible for refrigeration equipment had been the victim of a cybersecurity incident. The affected systems supervised and controlled cold rooms at three of its sites. The EFS said temperature and defrost thresholds had been changed to very high settings, but did not give a number in its statement.
Le Canard enchaîné reported that rooms intended to operate at −30°C were programmed to +110°C. That figure describes a controller setpoint, not a temperature measured inside a room. The EFS has not publicly confirmed the 110°C figure. The newspaper identified the contractor as Coolworld; the source material says the company had not publicly commented, and the EFS said it was not directly targeted.
The EFS said its monitoring and alarm systems detected the anomalies quickly. Equipment was brought under control or switched off, and plasma was transferred to other installations as a precaution. The EFS said the rooms held plasma for transfusions and plasma intended for fractionation, a process used to make medicines. Technical teams are working with France’s national cybersecurity agency, ANSSI, and the health ministry, while temperature monitoring across EFS equipment has 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 Cold Storage Matters
Frozen plasma is a treatment resource and a starting material for some medicines, so a sustained rise in storage temperature could put supplies at risk. European guidance cited in the source material says fresh frozen plasma is stored at −25°C or colder. A control-system change can therefore create a serious risk even if the extreme setpoint itself is never reached: the concern is whether products warm beyond safe storage limits before staff intervene.
In this incident, the EFS reported that alarms and staff response prevented a reported loss of products or health impact. That outcome makes the event relevant beyond blood services: hospitals, food businesses and other operators that depend on cold storage may rely on contractors’ remote access to maintain equipment. Independent alarms, checks by staff and a plan for moving stock can limit harm if a control system behaves unexpectedly. The source material does not establish that the blood-service incident was connected to attacks on supermarket refrigeration reported the same night.
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How the 110°C Figure Emerged
The EFS is France’s national blood service, collecting donations and supplying hospitals. Its Nov. 3 statement described a cybersecurity incident at a refrigeration equipment contractor and the affected installations, but did not name the contractor or specify the alleged setpoint. The additional details about Coolworld, the Bourgogne-Franche-Comté region and the 110°C setting come from Le Canard enchaîné, as relayed by other outlets, rather than from the EFS statement.
The episode occurred during the same night as a second wave of reported attacks on supermarket refrigeration systems in at least 11 European countries, according to the supplied source material. Two groups describing themselves as pro-Russian later claimed the supermarket attacks in a video, but that claim was unverified and the posts were deleted. No government had publicly attributed those attacks to a perpetrator in the material available. No authority has linked the supermarket incidents to the EFS case.
The 110°C number has also been repeated online with descriptions such as “boiled blood.” That is not supported by the reported evidence: it was a programmed target, and no source cited in the material reported a measured room temperature near that level. Reports about separate supermarket incidents cited temperatures of up to 50°C in some locations, but those figures do not establish what happened inside the EFS rooms.
““The EFS monitoring and alarm systems made it possible to identify these anomalies quickly.””
— Établissement français du sang, statement issued Nov. 3
What the Public Record Leaves Open
The EFS has not publicly identified the contractor or disclosed the exact settings changed, the methods used to access the systems, or the identities of the three affected sites. The contractor’s name and the 110°C setting are attributed to Le Canard enchaîné, not confirmed in the EFS statement. The EFS has also not published measured temperature readings or a detailed timeline showing how long the rooms were affected.
The service’s statement says no product was lost and no health impact was identified. It does not provide a public technical account of the incident or say whether the systems were reached through stolen credentials, a software vulnerability or another route. The investigation remains underway, and there is no evidence in the source material that the blood-service incident was coordinated with the supermarket refrigeration attacks.
Investigation and Monitoring Continue
The EFS said technical teams are working with ANSSI and the health ministry. It also said temperature monitoring had been increased across its equipment. The next confirmed developments are likely to come through those inquiries or further statements from the EFS, the contractor or authorities; the source material gives no timetable for a public technical report.
Until more details are released, the reported outcome remains that alarms detected the problem, plasma was moved and the EFS identified no health impact or product loss. Further reporting would need to establish how access was obtained, whether other equipment was exposed and whether investigators find any connection to the separate supermarket incidents.
Key Questions
Did a blood-service freezer actually reach 110°C?
No such measurement is reported. The 110°C figure was described by Le Canard enchaîné as a programmed setpoint; the EFS statement did not specify a number, and the source material reports no measured room temperature near 110°C.
Was any plasma lost or used to treat patients?
The EFS said its monitoring detected the anomalies and the stored plasma was moved as a precaution. It reported no loss of blood products and no identified health impact.
Which sites and contractor were involved?
The EFS confirmed that systems at three sites were affected but did not publicly name them or the contractor. Le Canard enchaîné named Coolworld and reported one affected region as Bourgogne-Franche-Comté; those details have not been confirmed in the EFS statement.
Was the blood-service incident connected to supermarket refrigeration attacks?
No link has been established in the available information. The events happened during the same night, but no authority has linked the incidents. Claims by groups about the supermarket attacks were unverified.
What happens now?
The EFS said its technical teams are working with ANSSI and the health ministry, and that monitoring across its equipment has been increased. A public account of how the systems were accessed and whether the investigation finds broader exposure has not yet been provided.
Source: ThorstenMeyerAI.com
