Back to security portal
Malicious change in mixed transactions
Reported on February 23, 2015
A specially crafted multisig transaction could leverage a ToCToU bug to include a change output of an attacker, which wasn't confirmed by the user.
Fixed in 1.3.1.
Reported by Nicolas Bacca
Trezor Model One
Resolved vulnerabilities
Reported by community. Investigated. Resolved. Because your security is never optional.
- Authenticity proofs not bounded to their secure element on TS7August 16, 2026
- THP pairing could be completed without the pairing codeJune 22, 2026
- Desktop update could install before signature verification completedJune 16, 2026
- Solana account-creation confirmation completenessJune 14, 2026
- Solana signing display improvementJune 12, 2026
- Coordination fee cap shown on CoinJoin authorizationJune 3, 2026