Trezor says mailing breach leaked 67K more users than first thought

MonitoringCryptoSecurity incidentFirst tracked 2026-09-04Last changed 2026-09-04

Current outcome

Trezor disclosed that its mailing partner breach actually leaked 67,000 more users than initially reported, bringing the total to over 80,000 and admitting its data-deletion policy was never enforced.

Progress timeline

1 material updates

#0109.04
Initial2026-09-04 13:35 · publication time
Trezor says mailing breach leaked 67K more users than first thought
Trezor disclosed that its mailing partner breach actually leaked 67,000 more users than initially reported, bringing the total to over 80,000 and admitting its data-deletion policy was never enforced.
Source evidence: Protos

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