Bullish
COLDCARD Mk3 Entropy Flaw Prompts Urgent Migration for Affected Users
2026-07-31 20:54:59
Insufficient entropy risk identified in COLDCARD Mk3 firmware 4.0.1+ seeds not generated via 50 dice rolls. Users urged to migrate funds immediately; firmware updates for Mk4/Mk5/Q-series also required.
Woofun AI reports that hardware wallet manufacturer COLDCARD has issued an urgent security advisory regarding insufficient entropy risks in Mk3 devices running firmware 4.0.1 or later. The vulnerability affects seeds not generated through at least 50 independent dice rolls, prompting the company to recommend immediate fund migration for impacted users.
COLDCARD further advised Mk4 and Mk5 device owners with firmware below 5.6.0, and Q-series users with firmware below 1.5.0, to upgrade their software before generating new seeds and migrating assets. The firm confirmed it is actively developing firmware updates for the discontinued Mk3 line to facilitate this process.
WOOFUN AI
Impact Assessment · Quick Read
This security disclosure highlights critical entropy generation flaws in specific COLDCARD firmware versions, necessitating immediate user action to secure assets. The requirement for manual seed regeneration via dice rolls underscores the importance of verifiable randomness in hardware wallet security. While migration processes are being supported via new firmware, the incident may temporarily impact user confidence in legacy hardware models.
Generated by WOOFUN AI · For reference only, not investment advice
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