Coldcard Wallet Security Flaw Leads to Bitcoin Theft

On July 30, 2026, a massive theft of Bitcoin worth approximately 70 million dollars was recorded, attributed to a security vulnerability in the Coldcard Hardware Wallet. The attack lasted only 41 minutes and resulted in the theft of 1,082.65 BTC from 1,196 Bitcoin addresses. The Canadian company Coinkite, which manufactures the Coldcard Wallet, is now facing serious questions about the security of its products.

Galaxy Research analyzed the theft and found that a bug in the firmware of the Coldcard Wallet was responsible for the vulnerability. An integration error from March 2021 caused the generation of seed phrases to be routed to a deterministic software pseudorandom number generator (PRNG). This faulty implementation allowed the attacker to compromise the wallets in a very short time.

The Coldcard Wallet is known for its security features and is regarded by many users as one of the safest hardware wallets for Bitcoin. However, the current security vulnerability raises serious concerns about the reliability of this technology. Users relying on the Coldcard Wallet are now worried about the security of their holdings and the integrity of the software used.

The affected Bitcoin addresses were systematically targeted by the attacker, indicating a well-planned and executed operation. The speed at which the Bitcoins were withdrawn suggests that the attacker had extensive knowledge of the vulnerability and may have made preparations in advance. The fact that 1,196 addresses were attacked within just 41 minutes points to an automated approach.

Community and Expert Reactions

The Bitcoin community reacted quickly to the news of the theft. Many users expressed their concerns about the security of hardware wallets in general and called for a comprehensive review of security standards in the industry. Experts warn that such incidents could undermine trust in hardware wallets, which are considered the safest method for storing cryptocurrencies.

Coinkite has not yet issued an official statement regarding the incident, which further fuels speculation about the impact on the company and its products. Analysts expect that the company will be forced to comment in the coming days and may announce measures to address the security vulnerability. The uncertainty about the future of the Coldcard Wallet could negatively affect the market.

The security vulnerability in the Coldcard Wallet is not the first incident of this kind in the cryptocurrency industry. In the past, there have been several cases of hacks and thefts attributed to vulnerabilities in wallets and exchanges. These incidents have led to increasing pressure on the industry to improve its security protocols and regain user trust.

Investigations into the theft are already underway, and it remains to be seen whether the stolen Bitcoins can be traced. While blockchain technology allows for some transparency, it is often difficult to determine the identity of attackers. Investigating such incidents typically requires extensive inquiries and collaboration with various authorities.

The Coldcard Wallet is a product specifically designed for the secure storage of Bitcoin. However, the current security vulnerability has shown that even the most secure systems can be susceptible to attacks. Users should be aware of the risks and regularly review their security measures.