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Ledger had 219 days between a researcher's implant report and the CryptoBilis wallet losses

Researcher Joe Grand says he told Ledger of an implanted Nano X on March 4, 219 days before the Oct. 9 CryptoBilis wallet losses. The case that Ledger gave no public warning rests on Grand's criticism and Mark Karpelès saying he has seen none.

The Investor · Invest desk

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Tampered-device reports reached Ledger before the losses Dates of the implanted Nano X purchase, the tampered-device reports to Ledger and Grand's alert, set against the Oct. 9 CryptoBilis losses.

Timeline: August 2025, a Nano X with a malicious implant is bought on Lazada Thailand, per Grand. December 2025, reports to Ledger of tampered devices date back to here, per Karpeles. March 4, 2026, Grand alerts Ledger. Oct. 9, 2026, CryptoBilis-related losses surface.

Tampered-device reports reached Ledger before the losses
DateEventClaim
August 2025Nano X with malicious implant bought on Lazada Thailand, per Grand1
December 2025Karpeles: tampered-device reports to Ledger date back to here12
March 4, 2026Grand alerts Ledger to the implanted Nano X1
October 9, 2026CryptoBilis-related losses surface11

What happened

  • Grand says Ledger acknowledged his findings and told him it was investigating internally, and he faulted the company for not proactively warning customers.
  • Karpeles told Cointelegraph he knew of two or more people who had reported tampered devices to Ledger, with cases going back to December 2025.
  • Ledger has confirmed that one affected device in the October losses contained an unauthorized implant.
  • In August 2026 Grand also alerted Trezor to tampered Trezor One and Model T wallets bought from unauthorized sellers on TikTok and Facebook.

Why it matters

  • Who's exposed exposure A buyer on a marketplace has to verify the individual seller, because the brand's own storefront and an unlisted seller such as LedgerXXX can sit on the same platform.
  • What it costs cost A vendor that pulls its reseller listings, as OneKey did, loses that sales channel until its checks are rebuilt; a vendor that keeps resellers carries the verification work instead.
  • Who has to decide decision Custodians cannot treat a reseller authorization list as a control, because the Oct. 9 losses involve wallets sold through a reseller authorized in Southeast Asia.
  • What doesn't add up contradiction Ledger answered questions about Grand's report by pointing to its public statements on X, so a dated post from before Oct. 9 would settle whether any warning went out.

Trezor has described its own trigger for warning customers, and it gives a yardstick for Ledger's silence. The company told Cointelegraph that counterfeit wallets occasionally appear through unauthorized sellers and that it warned in 2022 about modified devices sold on Russian marketplaces. Its recent claim of no evidence of compromised devices, it said, covered only new wallets sold through authorized resellers [9]. "What changes the picture is a new technique, or a first case coming through an authorised channel," Trezor said. "Either one means the problem has moved closer to ordinary buyers, and that's when we'd move fastest, including warning customers directly." [10]

Run Ledger's dates through that test. Grand's Nano X came from a Lazada seller called LedgerXXX, which was not listed as an authorized reseller in Thailand when Cointelegraph wrote [5]. He reported it to Ledger on March 4 [1]. The Oct. 9 losses involved wallets sold through CryptoBilis, a reseller authorized in Southeast Asia [3], and that date falls 219 days after Grand's report [11]. In our view the charitable reading fits: a lone report from an unauthorized seller is a case file, and a loss through an authorized reseller is a customer notice. We hold it with moderate confidence, because it applies Trezor's rule to Ledger, and the report does not say which channel the December devices came through.

Karpelès, the former CEO of the collapsed exchange Mt. Gox [17], concedes that silence on a single case may be normal. "Maybe Ledger not responding to a single event of an implant found on a Ledger purchased from a shady dealer is normal," he said [15]. His objection is the count, which he dates back to December 2025, earlier than Grand's March 4 report [12] [1]. He added: "However the increasing number of reports they must have received, and the increasing quality/technology used should have alerted them enough to act, and at least remind customers to be careful." [16]

The charitable reading fails on either of two findings. One is a December 2025 report whose device came through an authorized reseller; Ledger would then have held Trezor's trigger months before the losses. The other is evidence that the implant Ledger confirmed [4] did not come through CryptoBilis, because no authorized-channel case would then remain.

What to watch

  • Whether Ledger identifies a public warning dated before Oct. 9, or issues a direct customer notice afterward.
  • Which sales channel Ledger says the confirmed implant device and the December 2025 devices came through.
  • Whether other hardware wallet vendors follow OneKey in pulling reseller listings, and whether Trezor warns customers directly.

Information, not investment advice. This story is general information about companies and markets, drawn from cited reporting. It is not a recommendation to buy, sell or hold any security; check the cited sources before acting.

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  1. [1]

    Security researcher Joe Grand 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.

    Reported Supported Source: Cointelegraph, citing Joe GrandView cited source
  2. [2]

    Grand said Ledger acknowledged his findings and said it was investigating internally, but he criticized the company for not proactively warning customers about the threat.

    Reported Supported Source: Cointelegraph, citing Joe GrandView cited source
  3. [3]

    Ledger's ongoing security crisis surfaced Oct. 9, when crypto losses were reported involving wallets sold through CryptoBilis, a reseller authorized in Southeast Asia.

    Reported Supported Source: CointelegraphView cited source

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Sources

1 independent publisher whose own reporting we read for this story.

  1. cointelegraph.com

    1 article · October 16, 2026

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

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