Cryptocurrency exchange BigONE has confirmed that it suffered a security breach resulting in the loss of approximately $27 million in digital assets. The platform detected the hack earlier this week, raising concerns within the crypto community.

However, the exchange has moved quickly to reassure its users that private keys remain un-compromised and user assets are secure.

BigONE Cold Wallet Remains Untouched

The exchange emphasized that its cold wallet infrastructure, where it stores the majority of user funds, remained unaffected. According to BigONE, the breach targeted a single hot wallet, which had limited exposure.

While the platform has not yet disclosed specific technical details about how the hacker carried out the exploit, it confirmed that user withdrawals and trading remain operational. The team also stated that it will cover any losses incurred using the exchange’s risk reserve fund, ensuring no user suffers financial harm.

The stolen assets include a mix of major cryptocurrencies, including Bitcoin (BTC) and Ethereum (ETH). Blockchain analytics firms are already tracking the movement of the stolen funds in an attempt to identify the attacker and prevent laundering through decentralized exchanges or mixers.

Production Network Was the Main Target.

The attackers exploited the supply chain vector, gaining access to BigONE’s production infrastructure, according to security firms.

As a result, they compromised the logic surrounding risk management, along with account operations, allowing attackers to siphon funds exceeding $27 million.

The exploiter extracted around $4 million in ETH and multiple other tokens, according to CertiK Alert.

Additionally, the exchange company’s team noted that to handle losses and compensation, they have activated our internal security reserves, which include BTC, ETH, USDT, SOL, and XIN tokens.

BigONE added, “For other affected mainstream and non-mainstream tokens, we are actively securing external liquidity through borrowing mechanisms to restore the platform wallet as soon as possible.”

This breach is one of several high-profile exchange hacks in 2025, underscoring ongoing security challenges faced by centralized crypto platforms. The exchange has pledged to strengthen its security protocols, implement additional real-time monitoring tools, and undergo an independent security audit in the coming weeks.

“We are committed to transparency and user protection,” the exchange added. “Further updates will be provided as the investigation progresses.”