SonicWall Cloud Backup Breach: Firewall Configurations Compromised, Credential Resets Urged
In September 2025, SonicWall disclosed a cloud security incident that exposed firewall configuration backup files tied to less than 5% of MySonicWall accounts, prompting a company-wide advisory to reset credentials for impacted users. The breach involved unauthorized access to backup firewall preference files hosted in SonicWall’s cloud backup service, which could potentially allow attackers insight into sensitive network policies and infrastructure details. Upon detection, SonicWall revoked affected credentials, reset authentication tokens, and notified regulatory authorities and end-users. The incident underscores operational risks associated with cloud-based configuration repositories and the downstream consequences for enterprise security posture. This breach highlights ongoing attacker focus on cloud storage services and device configuration files, which are increasingly targeted for initial access or lateral movement. As regulatory scrutiny grows and advanced threats seek out persistent footholds, organizations face mounting urgency to harden cloud storage, segment sensitive data, and enforce continuous credential hygiene.
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