SonicWall is urging customers to reset credentials after their firewall configuration backup files were exposed in a security breach impacting MySonicWall accounts.

The company said it recently detected suspicious activity targeting the cloud backup service for firewalls, and that unknown threat actors accessed backup firewall preference files stored in the cloud for less than 5% of its customers.

"While credentials within the files were encrypted, the files also included information that could make it easier for attackers to potentially exploit the related firewall," the company said .

The network security company said it's not aware of any of these files being leaked online by the threat actors, adding it was not a ransomware event targeting its network.

"Rather this was a series o

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