Coldcard Bug Exposes $100 Million in Crypto Theft

A critical bug in Coldcard’s hardware wallet code slipped under the radar for two years, ultimately enabling the theft of $100 million in crypto assets.

Silent Collapse of the Code

Coldcard has long been hailed as the embodiment of the “trust but verify” mantra, yet this incident exposed a systematic breach of that principle. The flaw was identified as a missing boundary check in the binary parsing routine during firmware updates, allowing an attacker to inject a forged signature and redirect funds.

Audit Gap and Fallout

■$100 million in assets were siphoned over 2 years, with recovery still incomplete.

■Coldcard CEO Matt Corallo described the incident as a “lack of comprehensive code review.”

■Following the breach, roughly 10 % of the user base began seeking alternative wallets or immediate firmware patches.

Ripples Across Market Trust

The crypto‑security sector is re‑evaluating the risk that such systematic oversights can be exploited by malicious actors. Numerous exchanges and institutional investors are now demanding tighter SLAs and zero‑day testing from hardware wallet providers.

Regulatory Wake‑Up Call

The EU’s forthcoming MiCA framework aims to mandate security certifications for hardware wallets. In the United States, the SEC is reviewing crypto‑asset custody standards; this episode may accelerate requirements for code transparency and independent audits.

Deniz Arel, Director of Crypto Regulation & Compliance

This event underscores the necessity of shifting the industry’s focus from “trust” to verifiable security. Regulators should compel the adoption of open‑source code and periodic independent audits; otherwise, similar losses could drive institutional capital out of the market.