Security researcher @tayvano_ has identified compromised Ledger hardware wallets containing embedded LTE chips, CPUs, and eSIMs connected directly to legitimate Ledger boards. The modified devices remain fully functional while housing unauthorized cellular communication components within the original hardware casing. The discovery reveals a sophisticated supply chain attack where adversaries integrated cellular connectivity into authentic Ledger units without affecting normal device operation. This hardware-level compromise enables potential remote data exfiltration through the embedded LTE module while maintaining the appearance and functionality of genuine Ledger products.