Trezor Reveals Safe 7 Wallet Vulnerability, User Funds Remain Protected

Security Researchers Discover Hardware Flaw

Hardware wallet manufacturer Trezor has confirmed a vulnerability in its flagship Safe 7 device following a security review conducted by Ledger Donjon, the research division of rival hardware wallet company Ledger.

The audit uncovered a successful laser fault injection attack targeting Trezor’s TROPIC01 Secure Element chip. According to the findings, attackers could extract one of the three secret values used to protect a user's PIN code, effectively reducing the wallet's security architecture from three independent layers to two.

Despite the discovery, Trezor emphasized that the vulnerability does not directly expose user funds or private keys.

The company added that compromising this component alone is insufficient to bypass the wallet's remaining protections.

Why User Funds Are Still Safe

While the term "hardware vulnerability" may sound alarming, the practical risk to most users appears extremely limited.

Trezor explained that an attacker would first need physical possession of the device. They would then have to completely disassemble the wallet and utilize highly specialized laboratory equipment capable of performing laser-based fault injection attacks.

Even after successfully compromising the chip, the attacker would still face additional security mechanisms designed to protect access to the wallet.

Importantly, private keys are not stored inside the affected TROPIC01 chip, meaning the exploit does not directly expose the cryptographic credentials needed to access a user's cryptocurrency holdings.

The company also confirmed that the flaw cannot be used to install malicious firmware or create tampered devices capable of stealing assets remotely.

Ledger Audit Highlights Industry Collaboration

The discovery came through an independent audit conducted by Ledger Donjon, highlighting an unusual example of cooperation between competitors in the hardware wallet industry.

While Ledger and Trezor compete for market share among crypto users, security researchers from both ecosystems frequently investigate vulnerabilities that could impact the broader digital asset community.

The successful attack demonstrates that even advanced security hardware can contain weaknesses when subjected to sophisticated laboratory testing.

However, researchers note that laboratory exploits and real-world attacks are often very different in terms of practicality.

Experts Say Bigger Risks Remain Elsewhere

Blockchain security firm Cyvers agreed with Trezor’s assessment that the exploit is highly impractical for everyday attackers.

According to Cyvers CEO Deddy Lavid, the vulnerability requires such significant resources and expertise that it is unlikely to affect ordinary users.

Instead, Lavid warned that crypto holders remain far more vulnerable to common attack methods.

These attack methods account for the overwhelming majority of crypto theft incidents worldwide.

No Firmware Fix Available

Because the issue originates from the physical hardware design itself, it cannot be corrected through a software or firmware update.

Trezor has not yet indicated whether future hardware revisions will address the vulnerability or whether customers will be offered replacement devices.

The company has also not commented publicly on potential refund requests related to the disclosure.

For now, Trezor maintains that the Safe 7 remains secure for normal use and that the vulnerability does not present a realistic threat to the vast majority of users.

The incident nevertheless serves as a reminder that even the most secure hardware wallets must continuously undergo scrutiny as attackers and security researchers develop increasingly sophisticated techniques.