Cyber Shield

Sonicwall Backup Breach

Immediate Actions for SonicWall Users

SonicWall Firewall Backup Breach: What You Need to Do Now

If your business relies on SonicWall firewalls, it’s time to take urgent action. A recent breach possibly exposed 100% of SonicWall firewall backups, potentially compromising sensitive configurations, credentials, and network details. This is especially critical for small government agencies and businesses that depend on SonicWall for perimeter security.
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  • Change All Credentials – If your backup included admin credentials, VPN keys, or service accounts—rotate them immediately.
  • Audit Your Configuration – Review firewall rules, NAT policies, and VPN settings for unauthorized changes or exposure.
  • Update Firmware – Ensure your SonicWall device is running the latest firmware to patch known vulnerabilities.
  • Recreate Backups Securely – Delete old backups and create new ones using encrypted storage. Never store backups on publicly accessible or cloud-shared drives without proper access controls.
  • Enable Multi-Factor Authentication (MFA) – Apply MFA for all admin access to the SonicWall interface and any connected services.

Best Practices for Firewall Backup & Security

  • Encrypt Backups – Always use strong encryption (at least AES-256) for backup files.
  • Use Offline or Secure Vault Storage – Store backups in a secure, access-controlled environment—preferably offline or in a zero-trust vault.
  • Limit Access – Only authorized personnel should have access to firewall backups.
  • Regularly Test Restores – Ensure backups are functional and can be restored quickly in an emergency.
  • Monitor for Changes – Use logging and alerting to detect unauthorized changes to firewall configurations.


Don’t wait. If you’re a SonicWall user—especially in critical sectors like public safety, municipal services, or small business—review your firewall security posture today. If you need help re-securing your environment, reach out to a trusted managed service provider with cybersecurity expertise.

🔒 Need help? Contact us for a free firewall security checkup and backup audit.