The breach at Keystone has escalated to hardware security: hackers not only accessed customer data, but also stole an internal authentication key used to verify the authenticity of the manufacturer’s hardware wallets.
The stolen key introduces the risk of counterfeit products entering circulation. Armed with the key, attackers could produce fake wallets that pass Keystone’s official authenticity checks. If a counterfeit device is delivered to a customer who uses it as an original product, the crypto balances stored on it could be lost.
Keystone plans to destroy 18,835 devices from its warehouse inventory that contain the compromised key. The company has also suspended shipments of all units using the old key. Shipments will only resume once Keystone manufactures devices featuring a new authentication key.
Safe Cutoff Before October 20
Manufacturing and shipping dates are the deciding factors for user safety. Keystone stated that units produced and shipped before the October 20, 2026 incident are safe, and their authenticity checks remain trustworthy. In contrast, Keystone cannot guarantee the authenticity of devices shipped after October 20. Customers who received shipments after that date are urged to contact the official support team immediately.
Third-Party Monitoring Tool Served as Entry Point
Attackers breached the system by exploiting a vulnerability in a third-party monitoring tool used on Keystone’s website to escalate privileges. This gave attackers access to Keystone’s online storefront on the Shopify platform.
Out of 51,083 customer records on the Shopify store, hackers stole 25,964 customer data entries spanning from 2024 to 2026. Another 25,119 records had already been purged under a 180-day retention policy, but older records from the past two years remained undeleted due to a failure in an automated tool. The attackers also stole 12,873 records of incomplete transactions abandoned by shoppers at checkout.
Similar Incidents Hit Other Manufacturers
Keystone is not the only hardware wallet manufacturer to face security troubles throughout 2026. Ledger asked retail partners in Southeast Asia and Hong Kong to halt sales following reports of devices containing unauthorized implants. Coldcard and Coinkite issued warnings about an entropy bug discovered in July 2026. Trezor suffered a shipping partner breach in August 2026 that exposed data belonging to more than 80,000 users, while SafePal and BitBox were also affected by similar incidents this year.
For crypto wallet owners, this series of incidents demonstrates that hardware security risks can arise long before a device reaches the buyer’s hands. Users who received Keystone shipments after October 20 should verify the status of their units with customer support before transferring any assets onto them.
Reported by Cointelegraph.
Previously: Keystone Crypto Keys Untouched - But Customer Home Addresses Fall into Attacker Hands
Disclaimer: This article is for informational and educational purposes only, not financial advice. Cryptocurrency assets are highly volatile and carry significant risk. Always do your own research (DYOR) and never invest more than you can afford to lose.
