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Two Hacks, One Day, Two Completely Different Attack Surfaces

Today we lost tens of millions of dollars to two separate attacks. Both are worth understanding....

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dev.to

techspot.com

cryptobriefing.com

economictimes.indiatimes.com

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Two Hacks, One Day, Two Completely Different Attack Surfaces

COLDCARD lost $70M BTC due to firmware bug (entropy 40 bits); CryptoDAO lost $8.2M due to unprotected access. H1 2026: 80% of $1.1B stolen came from key theft/phishing, not smart contract bugs—crypto security requires audit across firmware, key management, and operations, not smart contract alone.

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cryptobriefing.com21 h fa

Hackers exploit Coldcard firmware flaw, stealing $89 million in Bitcoin from thousands of wallets

Coldcard firmware bug (versions 4.0.1–4.1.9) substituted software for hardware RNG in seed generation, enabling $89M theft from 4,585 addresses (July 2026). Self-custody risk now extends to firmware integrity; BIP-39 passphrases and supply-chain audits essential.

Two Hacks, One Day, Two Completely Different Attack Surfaces

Confronto fonti

Two Hacks, One Day, Two Completely Different Attack Surfaces

Hackers exploit Coldcard firmware flaw, stealing $89 million in Bitcoin from thousands of wallets

Timeline cronologica

Two Hacks, One Day, Two Completely Different Attack Surfaces

A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88 million

A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88…

Hackers hit Bitcoin’s safest hiding place in ongoing attack - The Economic Times

Hackers exploit Coldcard firmware flaw, stealing $89 million in Bitcoin from thousands of wallets

Hackers hit Bitcoin’s safest hiding place in ongoing attack - The Economic Times