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Trezor warns users of email provider breach, phishing attacks

Trezor said the fake alert can bypass email protections because attackers used a compromised provider, and the company warned recipients not to share wallet backups.

  • On Wednesday, Trezor reported that its third-party newsletter provider was breached, resulting in phishing emails sent to customers impersonating the hardware wallet maker.
  • BitBox and CoinTracking confirmed similar breaches of the same newsletter provider, identified as Brevo, after receiving phishing attempts impersonating their services.
  • The phishing emails resembled a spray-and-pray campaign rather than sophisticated targeting, urging recipients to share wallet backups. Trezor warned: "Do not click it or interact with it."
  • This incident follows a separate logistics breach involving partner ShipMonk; Trezor confirmed on September 4 that the total number of affected customers rose to more than 80,000.
  • The campaign coincides with broader industry concerns regarding random number generation after a Coldcard Mk3 firmware flaw earlier this year led to an attack on July 31 moving 594 BTC worth approximately $38 million.
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BITRSS broke the news on Wednesday, September 9, 2026.
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