A critical vulnerability in MediaTek’s Dimensity 7300 chipset has been revealed by the security team of crypto hardware wallet manufacturer Ledger, raising significant alarm among Android device users who store digital assets on their phones. According to Ledger researchers, attackers with physical access to the device can extract PIN codes and crypto wallet seed phrases within seconds, putting millions of users’ funds at substantial risk.
Dimensity 7300 Exposure and Scope
The Dimensity 7300 processor is widely used in mid-range Android smartphones worldwide. Ledger points out that this hardware weakness directly affects nearly one in four such devices on the market. Notably, some devices operating within the Solana ecosystem fall into the affected group, meaning millions of phones could be susceptible to exploitation due to this security flaw.
Technical details released by Ledger indicate that the root of the problem lies in the chipset’s boot ROM—a core component activated before the operating system loads and which cannot be updated after the fact. Exploiting this, researchers were able to induce errors using electromagnetic pulses at startup, allowing the system’s hardware-level security checks to be circumvented. Once in, attackers can gain full access privileges over the ARM-based chips, putting all device data in jeopardy.
Data Security and Impact on Crypto Wallets
The attack detailed by Ledger enables offline decryption of a device’s protected storage area, exposing sensitive information such as crypto wallet PINs, seed phrases, and private keys. These capabilities render standard software-level security measures powerless. In internal tests, Ledger’s technical team demonstrated that this form of breach can be executed rapidly—in mere seconds—underlining the seriousness of the threat.
In response, MediaTek has underlined that attacks requiring physical device access fall outside the scope of the chipmaker’s security obligations. However, as a growing share of crypto holdings are being managed via mobile devices, many in the community view this stance as insufficient and demand more robust safeguards by manufacturers.
Chain analysis reveals that crypto theft targeting individual wallets has surged in recent years. In 2024, nearly 44 percent of reported losses stemmed from breaches of individual wallets—a steep climb from just 7.3 percent in 2022. This rapid increase amplifies worries about the adequacy of protection for ordinary users’ funds on mobile devices.
Ledger’s Chief Technology Officer has emphasized that smartphones were never intended to serve as digital vaults, advising users with significant assets to transfer their funds to dedicated hardware wallets.
Ledger announced that a software mitigation will be proposed in the March 2026 Android security bulletin. Yet, because the flaw is baked into the hardware, such updates cannot deliver complete protection against this particular exploit.
With hardware-based security issues persisting, debate is growing around whether mobile phones are a sustainable solution for crypto asset storage in the long run.
