Marquis, a Texas-based provider for credit unions and banks, disclosed that a breach discovered in August 2025 exposed personal and financial records of roughly 672,000 individuals. The company says attackers exploited a SonicWall firewall flaw amid reports of a possible ransom payment and ties to the Akira group, while earlier estimates from banks and Comparitech suggested a much larger impact. #Marquis #SonicWall #Akira #Comparitech
Keypoints
- Marquis discovered the breach in August 2025 and notified authorities in December.
- About 672,000 individuals had names, addresses, SSNs, dates of birth, taxpayer IDs and payment card data stolen.
- Earlier estimates from banks and Comparitech ranged from about 780,000 up to 1.6 million affected people.
- Marquis reported the attackers exploited a SonicWall firewall vulnerability.
- No group has claimed responsibility, though reports suggest a ransom may have been paid and Akira activity targeted SonicWall flaws.
Read More: https://www.securityweek.com/marquis-data-breach-affects-672000-individuals/