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Weak passwords and credentials are the most common way hackers gain access to POS systems.

Wendy’s security breach exposes weaknesses in POS systems

Multiple providers and insufficient security could put customers’ credit card data at risk

In January, The Wendy’s Co. said it was investigating possible credit card fraud at some of its restaurants.

The security breach has dogged the company ever since. Last week, the Dublin, Ohio-based quick-service operator said that the breach was far larger than it initially reported, with many more than 300 restaurants affected.

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