Trezor warned in August 2026 that length alone does not guarantee entropy because automated cracking tools systematically test dictionary words, leaked passwords, and common patterns

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The THORChain solvency checker triggered an emergency pause halting Ethereum transaction signing within two minutes of detecting a vault shortfall

A March 17, 2021 firmware migration error caused Coinkite Coldcard devices to run seed generation on a software generator instead of hardware, producing weak recovery phrases

Using a 128-character passphrase on a Trezor device requires both the latest Trezor Suite app and updated device firmware, while older Trezor firmware retains a 50-character limit

Attackers reconstructed weak Coldcard recovery phrases to access wallets, but users with strong, unique passphrases were protected from the Coldcard attacks

Galaxy Digital's Alex Thorn estimated that the Coldcard seed vulnerability resulted in over 1,596 BTC stolen across roughly 7,300 addresses, totaling over $100 million in losses

Trezor stated that increasing Trezor's passphrase length was prompted by user inquiries following the July 2026 Coldcard seed generation flaw

Blockstream CEO Adam Back stated that Liquid Network refreshed peg-out authorization keys, moved them to cold hardware wallets, and completed third-party security audits

Trezor designated Trezor's passphrase feature as an advanced feature and warned users that a mistyped or forgotten passphrase can result in lost funds

On August 2, 2026, X account BTC Sessions reported the first confirmed loss from the July 2026 Coldcard seed flaw thefts involving a device using a weak two-word passphrase

Coinkite advised that Coldcard wallets were vulnerable unless created with 50 independent dice rolls or protected by a strong, unique passphrase

Trezor stated in August 2026 that its own hardware wallets were unaffected by the July 2026 Coldcard seed generation flaw, but advised users to move wallets created on a Coldcard and restored on a Trezor

Trezor Model T, Safe 3, Safe 5, and Safe 7 hardware wallets support 128-character passphrases, whereas the Trezor Model One maintains a 50-character limit

The Aztec protocol operates without protocol-level viewing keys or centralized backdoor access

Operating the Aztec network requires dedicated prover entities to generate zero-knowledge proofs for transaction blocks

Telegram trading bots like BloomTrading manage or hold user private keys to execute automated trades, creating central attack vectors for server-side vulnerabilities.

BloomTrading stated that no user private keys were compromised or accessed during the October 26, 2026 remote code execution exploit.

In September 2024, Telegram trading bot Banana Gun reported an exploit where 11 users lost approximately $3 million in Ether.

In October 2023, users of Telegram trading bots Maestro and Unibot lost a combined $1.1 million to smart contract router exploits.

BloomTrading attributed the October 26, 2026 security breach to a remote code execution vulnerability in a third-party software module.

Trezor announced plans to significantly reduce and restructure its global authorized reseller network beginning January 1, 2027, to strengthen supply chain control.