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Senator Ron Wyden (D-OR) sent a letter to Amazon (AMZN - Get Report) CEO Jeff Bezos on Monday seeking more information on the security of Amazon's cloud service product following the recent hacking of 106 million Capital One (COF - Get Report) accounts of both customers and credit card applicants.

Capital One announced that its systems had been breached on July 29, and the FBI alleged that a firewall misconfiguration allowed the hacker to access the data stored on servers that Amazon owns. The alleged hacker was a former employee of Amazon cloud services business.

"When a major corporation loses data on a hundred million Americans because of a configuration error, attention naturally focuses on that corporation's cybersecurity practices," Sen. Wyden's letter said. "However, if several organizations all make similar configuration errors, it is time to ask whether the underlying technology needs to be made safer."

Senator Wyden noted that Ford (F - Get Report) , the Ohio Department of Transportation, Michigan State University and others are all investigating similar breaches that impacted them. 

The Wall Street Journal reported that more than 800 Amazon users were found to have similar vulnerabilities in their configurations. 

Amazon shares were rising 0.3% to $1,770.59 on Tuesday morning.

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Editor's Note: Story has been updated to reflect that the 106 million affected accounts were both customer accounts and applicants for credit cards.