Brevo Account Flaw Exposed 347,000 Trezor Subscribers to Phishing Email

A login flaw at email marketing platform Brevo enabled a phishing campaign targeting 347,000 Trezor subscribers, Trezor told Cointelegraph. The hardware wallet company said it is treating every affected email address as “known to the attacker and possibly reusable for phishing.” The disclosure highlights the potential for compromised mailing-list access to expose cryptocurrency users to targeted scam messages. Trezor did not indicate in the supplied report that its wallet systems were breached. Users whose addresses were included in the mailing list may face further phishing attempts, according to the company’s stated assessment. The incident is relevant to crypto markets because phishing campaigns can target users of digital-asset services and attempt to obtain sensitive information or access. Cointelegraph published the report on September 11, 2026.