Waltio confirms leak of client email addresses after Brevo breach
- —Brevo confirmed unauthorized access to 120-138 client accounts on September 9-10
- —Waltio stores only email and department number with Brevo, tax data was not affected
- —Data on 347,000 Trezor subscribers leaked through Brevo, and 2,500 clicked a phishing link
- —In January 2026, Waltio already suffered its own breach with a leak of tax report data
Why it matters: The leak of email addresses from crypto tax services creates a base for targeted phishing and physical attacks on crypto holders in France.
Source: CryptoTicker