Published: February 1, 2014, 8:45 pm

Updated: 8 hours ago

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Bell Canada confirmed Sunday that tens of thousands of customer records were leaked online Saturday by hackers in one of the biggest security breaches of a Canadian company in recent memory.

The telecom said 22,421 user names and passwords and 5 valid credit card numbers were stolen from a third-party supplier’s systems in Ottawa and only affected small businesses, not general users.

“In line with our strict privacy and security policies, Bell is contacting affected small business customers, has disabled all affected passwords, and has informed appropriate credit card companies,” Bell said in a press release. “We continue to work with the supplier as well as law enforcement and government security officials to investigate the matter.”

The hacktivist collective NullCrew has taken credit for the attack, announcing the leak early Saturday on its Twitter account.

via Hackers leak tens of thousands of Bell customer records | canada.com.