Cyber Incident Disrupts Fehmarn Belt Tunnel Construction

• •A cyber incident disrupted construction of the Fehmarn Belt tunnel on October 13, 2026.
• •Central systems at Femern Link Contractors were disabled, affecting project timelines.
• •No details on the attack vector, responsible parties, or potential data theft have been confirmed.

On October 13, 2026, a cyber incident affected Femern Link Contractors (FLC), the main contractor for the Fehmarn Belt tunnel project linking Denmark and Germany. The incident reportedly disabled central systems, significantly disrupting construction activities. Femern, the project owner, confirmed the incident and stated they are in dialogue with FLC but have not disclosed specific details about the affected systems or the scope of the disruption. Local media reports indicate that the incident has impacted work on this multibillion-kroner infrastructure project. There has been no confirmation of ransomware involvement, data theft, or attribution to any threat actor. The tunnel, once completed, is expected to reduce travel time between the two countries to seven minutes by train and ten minutes by car. Construction began in 2020 on the Danish side and in 2021 on the German side.