Overview
- Marquis says a ransomware attack on August 14 breached its network through a SonicWall firewall vulnerability described in filings as a zero‑day.
- State disclosures confirm at least 400,000 people affected so far, with Texas comprising the largest share, while Security Affairs now reports the total exceeds 780,000.
- Exfiltrated data includes names, addresses, dates of birth, Social Security numbers, taxpayer identification numbers, and bank, debit, or credit account details.
- Notifications identify 74 affected banks and credit unions nationwide, reflecting Marquis’ role serving more than 700 financial institutions.
- Marquis reports no evidence that the data has been misused or published, customer notices detail new firewall, MFA, logging, and geo‑IP controls, and a deleted filing claimed a ransom was paid, which remains unconfirmed.