After the Keystone intrusion on October 20, six major players in crypto security are now facing attacks in 2026. Between hardware hacks and massive data leaks, the crisis of confidence which is hitting each cold wallet now promises to be historic and worries investors.
In brief
- An intrusion into Keystone’s official website on October 20 exposed physical addresses and customer order histories.
- A critical flaw in entropy generation allowed Coldcard private keys to be reconstructed and nearly $116 million siphoned off.
- Trezor, BitBox and SafePal deplore the exposure of hundreds of thousands of customer data via third-party providers.
- Almost all of the attacks accumulated over a critical three-month period, revealing a systemic vulnerability in the ecosystem.
Six crypto security giants hit in 2026
The dogma according to which storing your private keys on a physical box guarantees absolute security has just taken a fatal blow. In the span of a few months, cybercriminals in 2026 have demonstrated their ability to target crypto security across the entire chain. This includes key generation, corruption of hardware supply chains and email subcontractors.
Latest episode, the manufacturer Keystone confirmed on October 24 that it had been the victim of a data breach on its website, following an intrusion that occurred on October 20. While crypto users’ private keys theoretically remain intact, the delivery and purchase data of thousands of customers can now be exploited by targeted hacking networks.
| Incident date (2026) | Brand concerned | Nature of the fault / Incident | Impact for Crypto User |
| October 20 – 24 | Keystone | Website intrusion (detected on the 20th, confirmed on the 24th) | Addresses and commands exposed |
| July 30 | Coldcard | Seed phrase generation flaw | Keys rebuilt, ~$116M stolen |
| Jan. 5 / Oct. 10 | Ledger | Global-e leak / Reseller physical implant | Data theft & seed phrase interception |
| August 13 / September 10. | Trezor | ShipMonk & Brevo data leaks | More than 427,000 emails/data exposed |
| August 16 | SafePal | Flaw in order tracking | 39,798 customer data compromised |
| September 24 | BitBox | Email theft via subcontractor Brevo | Massive targeted phishing campaigns |
Increasingly sophisticated Cold Wallet attacks
If the database thefts suffered by Trezor, BitBox and Keystone expose crypto users to waves of social engineering and phishing (phishing) ultra-targeted, structural vulnerabilities cross a critical threshold. The most financially devastating case remains the Coldcard incident revealed in July, where attackers reconstructed user keys and stole approximately $116 million in bitcoin.
On the physical level, the confirmation by Ledger on October 10 of the existence of malicious components (hardware implants) inserted on devices marketed by third-party resellers illustrates the fragility of distribution channels. The trapped component recorded the crypto security phrase as soon as the device was turned on.
Why did crypto breaches break out in just one quarter?
Timeline analysis reveals an abnormal concentration of crypto incidents between August and October. According to cybersecurity experts, this phenomenon is not a coincidence but the result of three combined factors:
- Summer supply chain fragility: Replenishment of inventory for the third quarter exposes logistics and third-party resellers to physical intrusions (e.g. implants on hardware cases).
- Web2 leverage: The dependence of manufacturers on marketing and delivery subcontractors (often targeted during the summer period) caused a wave of on-chain data leaks at the start of the school year (e.g. the attack on Brevo impacting Trezor and BitBox).
- Security audit contagion: The Coldcard earthquake revelation this summer prompted security researchers to scrutinize the entire market, triggering a wave of successive disclosures and patches in September and October.
The end of the illusion of absolute security of Cold Wallets
This accumulation of vulnerabilities in 2026 forces the crypto industry to review its risk management standards. The weaknesses do not lie only in the cryptographic algorithms, but in the vulnerability of external Web2 providers used for logistics or marketing. To protect themselves from this systemic crisis, holders of crypto assets must apply strict hygiene rules.
In particular, purchase exclusively from the official channels of the different Cold Wallet brands, reset any suspicious device, configure a passphrase extension and use anonymized delivery addresses. As Changpeng Zhao (CZ) says so well, “Stay SAFU”!
This succession of hacks and leaks on physical wallets demonstrates that self-custody (self-custody) requires constant vigilance. Faced with the multiplication of these flaws in 2026, do you retain all your confidence in the manufacturers of crypto cold wallets?
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