CVE-2026-20435: How a MediaTek Boot Chain Flaw Exposes Crypto Wallets on 25% of Android Phones

TL;DR On March 12, 2026, Ledger's Donjon security team publicly disclosed CVE-2026-20435 — a critical boot chain vulnerability in MediaTek processors that allows an attacker with physical access to extract phone PINs, disk encryption keys, and crypto...