Vintage iPhones Could Leak Crypto Seed Phrases

OneKey founder Ishi has flagged a serious issue for anyone treating older iPhones as air-gapped crypto wallets. Certain models carry permanent hardware flaws that no software patch can fix.

Devices from the 4S through the X are exposed to the checkm8 exploit, while XS, XR, the 11 series and the second-generation SE carry the newer usbliter8 flaw disclosed in June 2026. Both sit at the BootROM level, so a USB connection plus physical access is enough to open the door.

Apple’s Secure Enclave and device passcodes still add layers of defence, yet prolonged third-party handling or hardware tampering raises the stakes for seed phrases.

Ishi urges affected users to generate fresh recovery phrases on a trusted device and move their holdings immediately. He also recommends switching to newer phones, keeping iOS current and using strong passwords.

Based on information from cryptonews.net