SonicWall Urges Credential Resets After Security Breach
On September 19, 2025, SonicWall warned customers to reset all firewall-related credentials following a security breach.
Key points
- SonicWall warned customers on September 19, 2025.
- Security breach exposed configuration backup files from MySonicWall accounts.
- Initially reported as less than 5% of firewall backup files accessed, later confirmed all cloud backups compromised.
Connected intelligence
Signal brief
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Organization
- Published
- Sep 19, 2025
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 2 sources
Structured assessment
Signal analysis
It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch exposure paths that could affect data, operations or third-party trust.
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data, Server or cloud data store
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
On September 19, 2025, SonicWall warned customers to reset all firewall-related credentials following a security breach. Attackers accessed less than 5% of its firewall backup files through brute-force attacks on its cloud API service. Although the stolen files contained encrypted passwords, they also held information that could facilitate the exploitation of affected firewalls. Later, it was confirmed that all cloud backups were compromised.
When was this signal reported?
Shadow Tier lists Sep 19, 2025 as the signal date.
Which organization is connected to this signal?
Sonicwall is the organization connected to this public signal.
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