Crédit Mutuel Arkéa confirms a cyberattack that enabled fraudulent transactions
Crédit Mutuel Arkéa (banking systems)
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French regional bank Crédit Mutuel Arkéa said on Nov 4 2026 that it detected a cyberattack which enabled fraudulent transactions. Management temporarily suspended some transactions to secure operations and prevent further fraudulent movements, and said clients would not suffer financial loss. Independent researcher ZachXBT and Le Télégramme reported about €118 million ($133 million) diverted; the bank has not confirmed that figure. AFP and Euronews relayed the bank's confirmation of fraudulent transactions without an official loss amount.
Why this severity: Bank-confirmed cyberattack with fraudulent transactions; ~€118M figure from ZachXBT/Le Télégramme is unconfirmed by the bank
- Started
- Nov 4, 2026
Affected
- Crédit Mutuel Arkéa customers during the fraudulent-transaction window (bank says clients are protected from loss)
Fixed in
- Bank says the incident is under control and some transactions were temporarily suspended
Timeline1
News & write-ups2
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