Ledger’s early implant warnings deserved more action, Karpelès says

Ledger was contacted about tampered hardware wallets risks months before its latest security crisis, with former Mt. Gox CEO Mark Karpelès questioning its response.

French hardware wallet maker Ledger received multiple reports of malicious hardware implants months before its latest security crisis, according to Mark Karpelès, former CEO of the collapsed Bitcoin exchange Mt. Gox.

Karpelès told Cointelegraph he was aware of at least two people who contacted Ledger about tampered devices dating back to December 2025. Karpelès said he hasn’t encountered any public warning Ledger issued in response.

Joe Grand, a security researcher, told Cointelegraph he alerted Ledger on March 4, 2026, about a malicious implant in a Nano X purchased through online marketplace Lazada Thailand in August 2025.

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