Ethical Hacking News
The recent Coldcard and Liquid Network hacks have sent shockwaves throughout the Bitcoin community, highlighting the need for a renewed focus on security and the future of custody. As the cryptocurrency market continues to evolve, these hacks demonstrate the importance of being vigilant and proactive in protecting users' assets.
Summary: The recent security breaches involving the Coldcard hardware wallet and the Liquid Network sidechain have highlighted the need for a renewed focus on security and the future of custody. As the cryptocurrency market continues to evolve, these hacks demonstrate the importance of being vigilant and proactive in protecting users' assets.
The recent security breaches of the Coldcard hardware wallet and the Liquid Network sidechain highlight the need for a renewed focus on security and the future of custody.The hacks demonstrate the importance of being vigilant and proactive in protecting users' assets, even with self-custody wallets.A critical firmware flaw in the Coldcard devices allowed remote attackers to brute-force recovery seed phrases and drain over $100 million in bitcoin.A consensus bug in Liquid's Elements node software allowed attackers to mint unbacked L-BTC and cash it out via SideSwap, resulting in a $320 million sidechain drain.The prestige of the companies behind these hacks, such as Blockstream, makes the exploit particularly striking.The recent security failures require a rethinking of self-custody strategies, with multisig configurations and collaborative custody platforms being alternative paths forward.Other users may opt out of self-custody by using bitcoin ETFs or other custodial bitcoin derivatives, but this approach raises concerns about systemic custody centralization risks.The picture for crypto is unclear, with concerns about the feasibility of true decentralized finance (DeFi) in the face of increasing AI-powered attacks.
The recent security breaches involving the Coldcard hardware wallet and the Liquid Network sidechain have sent shockwaves throughout the Bitcoin community, highlighting the need for a renewed focus on security and the future of custody. As the cryptocurrency market continues to evolve, these hacks demonstrate the importance of being vigilant and proactive in protecting users' assets.
The Coldcard hack, which occurred in July 2026, exposed a critical firmware flaw in the popular Coldcard devices, allowing remote attackers to brute-force recovery seed phrases and drain over $100 million in bitcoin from thousands of supposedly secure addresses. This incident serves as a stark reminder of the hidden dependencies that persist even when self-custody wallets are used. Users must trust that the device's hardware is secure, its firmware is free of critical bugs, and no supply-chain tampering occurred during shipping.
Similarly, the Liquid Network sidechain was compromised in August 2026, resulting in a $320 million sidechain drain. The attack was attributed to a consensus bug in Liquid's Elements node software, which allowed an attacker to mint unbacked L-BTC and cash it out via SideSwap. The federation's automated signers released real bitcoin from the multisig wallet, and the attackers initially claimed to be white-hat security researchers. However, the conversation with Blockstream has since gone cold.
These hacks are particularly striking due to the prestige of the companies behind them. Blockstream, a highly respected technical figure in the Bitcoin community, was founded in 2014 by some of the most well-respected technical figures associated with Bitcoin, including longtime cypherpunk Adam Back. Despite this background, the flaw was merged into the associated repository on September 1 during an attempt to fix a separate issue.
The Liquid Network's federated sidechain design, which was meant to offer a higher degree of security due to the distribution of associated keys among fifteen parties, ultimately failed to prevent the attack. The federation's Bitcoin keys were never compromised in the recent security incident, but the system's automated signers released real bitcoin from the multisig wallet, allowing the attackers to drain the funds.
The prestige of the companies behind these hacks makes the exploit particularly striking. Blockstream was founded by some of the most well-respected technical figures associated with Bitcoin, including longtime cypherpunk Adam Back, who was cited in Satoshi Nakamoto's original Bitcoin whitepaper. Despite this background, the flaw was merged into the associated repository on September 1 during an attempt to fix a separate issue.
The recent security failures in highly trusted Bitcoin systems have forced a painful reckoning, showing that even users who mostly do everything right can lose money. The hacks demonstrate the importance of being vigilant and proactive in protecting users' assets and highlight the need for a renewed focus on security.
To be clear, these failures do not necessarily spell the end of Bitcoin as a technology or its associated crypto asset. However, they do require self-custody advocates to dramatically rethink their strategies. For those committed to maintaining sovereign control without relying on a single vendor, multisig configurations across hardware from multiple manufacturers represent a path forward. Collaborative custody platforms like Casa and Unchained offer another alternative where users can secure their assets with the assistance of specialists without handing over a controlling level of custody.
Other users may decide to opt out of self-custody entirely by way of a bitcoin ETF, stock in a bitcoin treasury company, or some other custodial bitcoin derivative. Strategy's STRC and Tether's USDT products already do this to some degree, for example. More such products could exist in the future in a scenario where bitcoin continues to gain credibility over time as a global, apolitical reserve asset.
However, this approach remains highly controversial among Bitcoin purists, who warn of systemic custody centralization risks and the historical precedent of government confiscations, such as Executive Order 6102 in 1933. The old world is dying, and the new world struggles to be born: now is the time of monsters.
The picture for crypto more generally is less clear, as the large numbers of hacks that have taken place in the space combined with the large attack surfaces involved with more complex crypto systems have put into question whether true decentralized finance (DeFi) will stand the test of time. Some blockchain security experts have already warned against using DeFi at all during this 'time of monsters.' In April, the crypto industry experienced its worst month on record for exploits, averaging nearly one attack per day.
While attackers are already using AI to find and exploit bugs, many security teams expect the same tools to become a routine part of defensive code review and, over time, to make well-maintained software harder to break. At the end of the day, it also still matters that Bitcoin's base layer and consensus-critical Bitcoin Core code have not been successfully exploited in this wave of AI-powered attacks.
Related Information:
https://www.ethicalhackingnews.com/articles/The-Devastating-Consequences-of-the-Coldcard-and-Liquid-Network-Hacks-A-Wake-Up-Call-for-Bitcoins-Future-ehn.shtml
https://gizmodo.com/why-the-coldcard-and-liquid-network-hacks-were-the-worst-in-bitcoins-history-2000810617
Published: Sun Sep 27 07:30:29 2026 by llama3.2 3B Q4_K_M
