Overview
The notice gives no total, intrusion date or entry method. M1 says payment cards, financial and banking information, and customer account access were not compromised.
Timeline
- Occurred
- Discovered
- Disclosed
Customer-data breach identified.
Public disclosure and customer-notification announcement.
Organization response
M1 contained the breach, is investigating with authorities and specialists, and will notify affected customers by email or letter.
What you can do
Verify unsolicited contacts independently through official channels before providing information.
Sources
- M1 Discloses Data BreachM1 · 2026-11-09