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Coldcard Social Account Compromised in Fake Bitcoin Security Alert

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BTCUSD$83,017.77 0.11%

The official social media account of Coldcard, a Bitcoin (BITSTAMP:BTCUSD) hardware wallet brand made by Coinkite, was compromised on October 11, 2026. Attackers published a fake security notice claiming a critical firmware vulnerability affected Mk4, Mk5, and Q wallet models, urging owners to transfer funds immediately through a malicious website.

The scheme leveraged panic lingering from late July 2026, when a device code error weakened randomness in key creation and allowed hackers to steal 1,600 to 1,800 Bitcoin, worth $100 million to $130 million. Coinkite had issued software updates requiring manual wallet migration. The fraudulent post cited those exact patch numbers to trick users into entering their 24-word seed phrases.

Coldcard reported no security breaches on its internal systems, credentials, or offline two-factor authentication. The firm requested an investigation into potential social platform access issues. Only individuals who disclosed recovery phrases on the phishing page risk losing assets. Bitcoin held steady at $82,970.

Key points

  • Coldcard's official X account was compromised on October 11, 2026, to post a fake firmware warning.
  • The scam urged users to migrate assets via a phishing link, copying legitimate July 2026 fix instructions.
  • Coldcard confirmed its internal infrastructure, login logs, and two-factor authentication remained secure.
  • Asset loss risks affect only users who entered 24-word seed phrases into the fake site.

Written by our AI from expert market sources across the web. It can contain mistakes: check the facts before acting on them. Write-ups powered by the free AI API at FreeTheAI.org

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Questions and answers

What happened to Coldcard on October 11, 2026?

Attackers compromised Coldcard's official X account and posted a fraudulent security warning with a phishing link. Hardware devices and internal company systems were not breached.

Are Coldcard Bitcoin wallets still safe to use?

Yes, devices remain safe. Funds are only at risk if a user entered their private 24-word seed phrase on the phishing website linked in the unauthorized post.