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Marquis Sues Firewall Provider SonicWall, Alleges Security Failings with Its Firewall Backup Led to Ransomware Attack

Fintech firm Marquis has filed a lawsuit against firewall vendor SonicWall, alleging that a 2025 breach of SonicWall’s cloud backup service exposed critical firewall configuration data. The compromised backup files allegedly gave threat actors the keys to bypass SonicWall defenses, enabling a ransomware attack that stole personal and financial information of roughly 400,000 individuals. Marquis claims the breach caused significant reputational, operational, and financial damage. The case seeks a jury trial in the Eastern District of Texas.