Ledger CEO Pascal Gauthier Clashes With Karpeles Over $90M Hardware Wallet Implants

Published October 19, 2026, 6:55 AM PKT. Based on X posts by Ledger CEO Pascal Gauthier and former Mt. Gox CEO Mark Karpeles on October 17, 2026 (primary sources), and October 17-18, 2026 reporting by TokenPost, AMBCrypto, BeInCrypto and Coinotag (secondary sources). This is a follow-up to MABOnChain's October 17, 2026 report, in which Karpeles said Ledger received hardware implant warnings as early as December 2025 and never warned customers.

Ledger chief executive Pascal Gauthier publicly clashed with former Mt. Gox boss Mark Karpeles on X on October 17, 2026, over how early Ledger knew about sophisticated hardware spy implants and how loudly it warned customers, turning a technical dispute over device security into the most visible public falling-out of the industry's biggest hardware-wallet scandal. The argument centered on a single question: could clearer, earlier warnings from Ledger have prevented more than $90 million in user losses tied to tampered devices.

The "no white knight" exchange

Gauthier first defended Ledger's response in a public post, urging Karpeles to stick to known facts and avoid speculation. He then made it personal. "Coming from the Mt Gox CEO... Come on man, you are no white knight. Get real," Gauthier wrote on X, according to Coinotag. The jab referenced the 2014 collapse of Mt. Gox, when roughly 850,000 Bitcoin went missing under Karpeles' leadership. Karpeles answered that his own experience is precisely why he expects higher standards from this industry, and earlier in the exchange had told Gauthier: "I trusted you to do better," AMBCrypto reported.

The March security guide dispute

At the center of the argument is what Ledger knew and when. Karpeles pointed to a security guide on Ledger's own website dated March 6, showing both handmade and mass-produced spy chips, and argued that Ledger understood implants of this sophistication months before the losses mounted. The guide was updated in September, which leaves open when the images actually appeared, Coinotag noted. Karpeles later issued a correction on X: he had initially said Ledger did not talk about the implant situation at all despite knowing about it, then acknowledged that the company did publish an Academy topic in March 2026 that discusses implants and recommends buying devices directly from Ledger or from authorized resellers. In his earlier posts, Karpeles argued that a more visible channel than a blog post was warranted. Ledger asked sellers in seven Asian markets to pause sales, and MediaMarktSaturn halted Ledger sales on October 13 in coordination with the company, according to TokenPost, which also reported that Ledger had not yet examined devices shown online, including a Nano X that Karpeles said was sold through MediaMarkt with a spy implant.

The Genuine Check admission

The most damaging on-record detail is one Ledger does not dispute: its Genuine Check, the process meant to confirm a device ships genuine and unmodified, cannot detect an added implant if the device's original security chip stays intact. Karpeles helped expose the threat himself by opening a sealed Ledger device and finding a hidden circuit board planted inside it. The implant can capture a wallet's 24-word recovery phrase and transmit it to criminals, and that phrase gives attackers full control of every fund the device protects. Ledger has paused sales through the CryptoBilis reseller after investigators identified devices altered to capture wallet recovery phrases remotely. Rival Trezor has also moved to reduce its third-party reseller network.

A $90 million question nobody has verified

Estimates put the damage above $90 million, according to research cited across the saga's coverage, but Ledger has not confirmed a final figure publicly, and Karpeles' claim that earlier warnings could have prevented those losses remains unverified. Karpeles argued that implants built for mass production should have set off alarms. Gauthier said Ledger had done its utmost to protect users and described the security work as difficult.

This article is news reporting and is not investment advice.

Sources

• Pascal Gauthier, X posts October 17, 2026, primary source: defense of Ledger's response, the "stick to known facts" urging, and the "no white knight" reply to Karpeles
• Mark Karpeles, X posts October 17, 2026, primary source: "I trusted you to do better," the March 6 security guide claim, the Academy-topic correction, and the sealed-device implant finding
• TokenPost, October 18, 2026, secondary source: Gauthier's pushback on the earlier-disclosure claim, Ledger's seven-market seller pause, the MediaMarktSaturn October 13 sales halt, Ledger not yet examining devices shown online
• AMBCrypto, October 17-18, 2026, secondary source: Karpeles' December 2025 warning claim, the March 2026 Academy post, Gauthier reading the criticism as virtue signaling
• BeInCrypto, October 18, 2026, secondary source: the CEO clash over the $90 million wallet implant scandal
• Coinotag, October 18, 2026, secondary source: the "no white knight" exchange, the March guide's September update, and the Genuine Check limitation with an intact security chip