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On November 4, 2026, Crédit Mutuel Arkéa confirmed that it suffered a sophisticated cyberattack enabling fraudulent operations. Blockchain analyst ZachXBT identified the French bank as the alleged victim of the incident, estimating the cryptocurrency theft at over $133 million USD. In response to the event, Crypto.com stated that it had blocked funds linked to the theft. The bank clarified that access to its systems occurred through an external service provider’s platform and not via its online banking arm Fortuneo.
Why it matters
The incident involves one of France’s major banks, based in Brittany. Crédit Mutuel Arkéa communicated that the incident did not impact customer assets and that operations are resuming regularly after a precautionary suspension of certain transactions. The bank emphasized that the attack was external and sophisticated, ruling out internal human error as the primary cause. According to on-chain analyses conducted by ZachXBT, the stolen funds were converted into USDC and USDT stablecoins before being swapped for Ether across various blockchain networks.
The numbers
ZachXBT’s estimate stands at over $133 million USD, with the hypothesis that the actual amount may be higher if OTC activities are included. The bank validated the order of magnitude of the figure without confirming an exact number, while France-Presse reports a provisional estimate of the attack at 100 million euros. Crédit Mutuel Arkéa counts approximately 5.8 million customers and recorded total assets of €211.5 billion in the first half of the year, with a net profit of €230 million. Part of the funds has been frozen by the platforms involved.
What remains to be understood
The identity of the attackers has not yet been made public. The bank is still assessing the exact financial extent of the final damage and has not clarified whether sensitive data was stolen in addition to monetary funds. It also remains to be determined exactly when the intrusion into the bank’s systems began, although ZachXBT’s initial report arrived on Monday relative to the publication of official statements.
Sources: CoinDesk, Decrypt, Cointelegraph, Cointelegraph, Bitcoin Magazine, CryptoSlate.
This article is for informational purposes only and does not constitute financial advice or an investment recommendation.
* Content created with the assistance of artificial intelligence systems.