# Massive Phishing Campaign Targets Trezor Users After Brevo Security Breach

*Published September 14, 2026*
*Source: [https://www.bleepingcomputer.com/news/security/trezor-347-000-users-targeted-in-phishing-attacks-after-brevo-breach/](https://www.bleepingcomputer.com/news/security/trezor-347-000-users-targeted-in-phishing-attacks-after-brevo-breach/)*

## Executive Summary

*This is a Premium edition. The Executive Summary is available to sec-news.ai members —*
*[read it here](https://www.sec-news.ai/news/massive-phishing-campaign-targets-trezor-users-after-brevo-security-breach) or [see plans](https://www.sec-news.ai/pricing).*

## Article

A recent security breach at Brevo has put approximately 347,000 users of Trezor, a popular cryptocurrency hardware wallet, at risk of phishing attacks. Brevo, an email marketing service provider, experienced a compromise that exposed Trezor-related email addresses. This breach allowed cybercriminals to send phishing emails designed to steal sensitive information from Trezor users.

The attackers crafted emails that appeared legitimate, tricking recipients into clicking on malicious links. Of the 347,000 targeted individuals, about 2,500 users were reported to have clicked on these harmful links, potentially exposing their private data. The phishing emails were sophisticated, making it challenging for users to distinguish them from authentic communication from Trezor.

The impact of this breach is significant, as it highlights the vulnerability of third-party service providers and the cascading effects of such breaches on their clients. Users of cryptocurrency wallets, such as Trezor, are urged to be vigilant and verify the authenticity of any communication they receive. Trezor has advised users to avoid clicking on links in unsolicited emails and to use the official Trezor website for any necessary actions.

In response to this incident, security teams and individual users must reinforce their email security measures and remain cautious of potential phishing attempts. The breach underscores the importance of securing third-party services and the need for constant vigilance in an increasingly digital world.