Security researcher Joe Grand says he warned Ledger in March after inspecting a suspicious Ledger Nano X obtained through an online marketplace in Thailand. The device contained unauthorized components that could interfere with sensitive wallet operations. Cryptocurrency thefts involving physically modified hardware wallets have been reported, notably through third-party sales channels. Former Mt. Gox CEO Mark Karpelès has publicly questioned Ledger’s response. The company distinguishes these supply-chain incidents from any compromise of its own core manufacturing or cryptographic systems.
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