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<\/p>\nA vulnerability in the seed generation process of the COLDCARD hardware wallet is being linked to the large-scale Bitcoin theft that occurred at the end of July 2026. According to The Hacker News, Galaxy Research recorded that 1,082.65 BTC, worth about $70.2 million at the time of withdrawal, was transferred from 1,196 addresses in just 41 minutes. BleepingComputer gave a loss estimate of approximately $88.6 million, reflecting price fluctuations and calculations at the time of the update.<\/p>\n
It is worth noting that the problem did not originate from a normal phishing campaign, but from a firmware integration error from March 2021 that caused the seed generation process to go through a deterministic pseudo-random number generator in the software. With cryptocurrency wallets, the seed is the root of asset control; If seeds can be predicted or the search space is narrowed, the \u201ckeeping keys offline\u201d security model loses practical meaning.<\/p>\n
<\/p>\n
According to sources, the withdrawal took place on July 30, 2026 and appeared to target wallets with seeds created during the affected firmware period. Galaxy Research believes that an integration error caused some of the seeds generated using random sources to be weaker than expected. When the seed does not have enough entropy, an attacker can try to regenerate private keys at scale, then automatically transfer assets from the found addresses.<\/p>\n
COLDCARD is Coinkite's line of Bitcoin-only hardware wallets, often chosen by users because of its isolated design, support for offline transaction signing, and reduced contact with an internet-connected computer. However, the incident shows that hardware wallet security does not only depend on whether the device is \"air-gapped\" or not, but also depends on the quality of the firmware, key generation chain and the independent verifiability of each release.<\/p>\n
In cryptography, the random number generator determines the difficulty of guessing the key. A typical Bitcoin seed must be random enough that testing all possibilities is impossible. If the seed generation process falls into a deterministic source of pseudo-randomness or is limited by a predictable state, the number of possibilities to try can be drastically reduced.<\/p>\n
This is different from users having their recovery phrases exposed through a photo, email, or fake page. In the case of a weak RNG, the user can still keep the seed completely secret, but the seed is not secure enough in the first place. This type of risk is difficult to detect on your own, because the wallet address still functions normally until the assets are withdrawn.<\/p>\n
Users who created seeds using COLDCARD during the firmware stages mentioned above are advised to stay tuned for official announcements from Coinkite, Galaxy Research, and independent analytical sources. With high-value assets, it is prudent to create a new wallet with verified firmware, move the assets to the new address, and do not reuse the old seed if it was likely created in the affected environment.<\/p>\n
Digital asset management organizations should also review the custody process: keeping firmware history, recording seed creation times, separating transfer approval rights, and checking for unusual transactions in real time. When the risk lies at the key generation layer, a slow response can cause the entire balance to be withdrawn within minutes.<\/p>\n
Hardware wallets are still an important layer of defense, but should not be interpreted as an absolute guarantee. Users need to update firmware from official sources, read security warnings carefully, avoid buying used or unknown devices, and consider dividing assets instead of putting it all in a single seed.<\/p>\n
With large holdings, the multisig model can reduce the risk from one device or one manufacturer's failure. Although multisig is more complex, it creates an additional layer of control when a single seed is weakened, exposed, or created by a buggy software component.<\/p>\n
The COLDCARD incident reiterates a core principle of cybersecurity: the more trusted a system is, the more damaging a failure in the foundation can be. In cryptocurrency, where transactions are nearly irreversible, errors in key generation can turn into direct losses after just one successful exploit.<\/p>\n
For manufacturers, technical transparency, independent audits and rapid user alert mechanisms are vital. For users, the important question is not just \u201cis the wallet safe\u201d, but \u201cwhen was the seed created, with what version, and is it still trustworthy\u201d.<\/p>\n
VNCyberS<\/strong> compiled from The Hacker News, BleepingComputer and Galaxy Research<\/em><\/p>","protected":false},"excerpt":{"rendered":" M\u1ed9t l\u1ed7 h\u1ed5ng trong qu\u00e1 tr\u00ecnh t\u1ea1o seed c\u1ee7a v\u00ed ph\u1ea7n c\u1ee9ng COLDCARD \u0111ang \u0111\u01b0\u1ee3c li\u00ean h\u1ec7 v\u1edbi v\u1ee5 \u0111\u00e1nh c\u1eafp Bitcoin quy m\u00f4 l\u1edbn x\u1ea3y ra cu\u1ed1i th\u00e1ng 7\/2026. Theo The Hacker News, Galaxy Research ghi nh\u1eadn 1.082,65 BTC, tr\u1ecb gi\u00e1 kho\u1ea3ng 70,2 tri\u1ec7u USD t\u1ea1i th\u1eddi \u0111i\u1ec3m b\u1ecb r\u00fat, \u0111\u00e3 b\u1ecb chuy\u1ec3n kh\u1ecfi […]<\/p>\n","protected":false},"author":2,"featured_media":1837,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[549,550,555,548,557,556,551,553,554,402,552],"class_list":["post-1839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc","tag-bitcoin","tag-bitcoin-theft","tag-coinkite","tag-coldcard","tag-crypto-security","tag-galaxy-research","tag-hardware-wallet","tag-rng-flaw","tag-seed-phrase","tag-tin-tuc-an-ninh-mang","tag-vi-phan-cung"],"_links":{"self":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts\/1839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/comments?post=1839"}],"version-history":[{"count":0,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/posts\/1839\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/media\/1837"}],"wp:attachment":[{"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/media?parent=1839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/categories?post=1839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vncybers.vn\/en\/wp-json\/wp\/v2\/tags?post=1839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}