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Fraudsters May Have Taken Data at CIBC's Simplii, BMO

  • Bank of Montreal says less than 50,000 accounts affected
  • Canadian banking group calls cyber attacks ‘extremely rare’
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Photographer: Ben Nelms/Bloomberg

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Canadian Imperial Bank of Commerce and Bank of Montreal are alerting clients that “fraudsters” claimed to have accessed personal and financial information of some customers.

The accounts of about 40,000 clients at CIBC’s online bank Simplii Financial may have been electronically breached, the Toronto-based lender said in a statement Monday. Bank of Montreal said separately that fraudsters contacted the lender saying they had certain personal and financial information for “a limited number” of customers. The bank estimates fewer than 50,000 clients were affected.