PIPEDA Findings #2021-003: Security deficiencies at BMO lead to large-scale breach
This investigation report concerns a large-scale breach of personal information at the Bank of Montreal (BMO), affecting approximately 113,000 customers. The OPC found that BMO's online banking software had significant vulnerabilities, including issues with developer security testing, vulnerability management, and oversight/monitoring, which allowed attackers to access sensitive data such as financial account numbers and SINs. BMO has since implemented substantial improvements to its security safeguards.


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