Ethereum co-founder Vitalik Buterin (@tayvano_) received one of the phishing emails targeting hardware wallet users, highlighting a wave of social engineering attacks on the sector. The incidents come amid a difficult week for hardware wallets, which also saw an attacker compromise Keystone's attestation key — the cryptographic credential used to verify device authenticity. The security lapses raise concerns about supply-chain and firmware verification risks for self-custody users. Buterin's public disclosure underscores that even high-profile figures are being targeted by increasingly sophisticated phishing campaigns aimed at hardware wallet ecosystems.