The key to the CoinDCX incident lies in the obvious gap between "the wallet has been deactivated" and "the related fund processing procedures are still running."
According to a statement released by CoinDCX on October 25, the wallet involved belonged to old operational infrastructure that was abandoned after the security incident in July 2025. Because some users were still transferring assets to outdated addresses, the platform chose to continue accounting for the related deposits and then, through an automatic sweeping service, transfer the funds to the main wallet. However, for a certain period, the automatic sweeping service failed to work properly, causing funds to remain stranded at the old addresses and ultimately resulting in a loss of approximately 15.99 million USDT.
From a user experience perspective, this arrangement is not entirely unreasonable. Cryptocurrency transfers are irreversible. If users transfer funds to old addresses and the exchange simply abandons processing them, users may face the dilemma of being unable to recover their assets. Continuing to identify old addresses and process mistakenly transferred deposits is in fact an attempt to strike a balance between user service and infrastructure migration.
But this is also where the problem arises: when an exchange decides to continue processing funds at old addresses, it means it cannot simply stop displaying the addresses and consider the related security responsibilities to be over. As long as old addresses may still receive assets, the platform must clarify who is responsible for monitoring, how funds are transferred, how anomalies trigger alerts, and what measures should be taken when the sweeping system fails.
In other words, the fact that an old wallet is no longer part of normal business processes does not mean it has left the scope of risk management. If the platform is still accounting for related deposits but cannot ensure that funds are transferred as expected, then the old addresses are in fact still within the exchange's operational responsibility chain.
This is also why this incident deserves industry attention. What the attackers exploited was not just a wallet address with security vulnerabilities, but also the possible management gaps among wallet retirement, user deposit processing, and automatic sweeping.
From $44 million to $16 million, why has risk appeared again?
CoinDCX experienced a security incident of approximately $44 million in July 2025. The loss of approximately 15.99 million USDT this time is not exactly the same situation as the previous incident, but there is a connection worth questioning: after the previous security incident, were the risks of the old infrastructure sufficiently isolated, and were the related asset processing procedures systematically rectified?
CoinDCX stated that the old wallet involved had been abandoned after the 2025 incident, but this investigation found that the automatic sweeping service had failed for a period of time, causing funds to accumulate. The platform said that the loss this time will be borne by the company, that current trading and wallet systems have not been affected, and that user fund balances are also unaffected.
This means that the two incidents cannot simply be identified as the same type of attack, nor can it be directly asserted, in the absence of a complete forensic report, that the platform's entire security architecture has systematically failed. However, the repeated emergence of major risks related to old wallets is enough to prompt outsiders to ask: did the previous security rectification only replace some addresses and systems, or has it already covered the complete processes of key management, historical address monitoring, handling of abnormal deposits, and fund sweeping?
In the daily operations of centralized exchanges, the wallet system is usually not a set of independent addresses, but a complex architecture involving deposit addresses, sweeping services, hot wallets, cold wallets, liquidity providers, and internal accounting systems. Problems in any one link may affect the flow of funds. If security rectification focuses only on replacing keys or migrating active wallets, without simultaneously cleaning up historical permissions, deactivating related services, and continuously monitoring old addresses, risks may reappear in different forms.
More notably, automated systems themselves are not inherently equivalent to security. Automatic sweeping can reduce manual operations and improve fund processing efficiency, but once service interruptions, task backlogs, or abnormal states go undetected, tools originally intended to reduce operating costs may also become channels for risk accumulation.
Therefore, what this incident truly tests is not whether the exchange has cold wallets, but whether it can prove that the entire fund lifecycle is in a state that is monitorable, traceable, and subject to timely intervention.
Why does on-chain data carry more weight than an immediate verbal response?
Another important clue in the incident is the time gap between CoinDCX's initial response to the abnormal transfers and its subsequent formal statement.
On October 22, CEO Sumit Gupta responded to an abnormal transfer alert raised by an on-chain investigator, saying that the address involved belonged to an old wallet affected in the 2025 security incident and that the alert might be a "false positive." Later, on-chain investigator ZachXBT raised doubts, pointing out that at least one of the addresses involved was still used by a liquidity provider after the July 2025 incident and had transferred funds to CoinDCX's current hot wallet in April and May 2026. CoinDCX ultimately acknowledged on October 25 that there had been problems with the old infrastructure and disclosed the amount of the loss.
This process reflects an increasingly obvious change in the crypto industry: the public on-chain ledger is changing the information relationship between exchanges and the market.
The flow of funds in traditional financial institutions usually relies on internal ledgers, audit reports, and regulatory disclosures, making it difficult for external observers to immediately grasp the specific transaction paths after an incident occurs. In a public chain environment, however, the transfer time, amount, transaction hash, and fund flows between addresses can be continuously tracked by external researchers. Although the actual controllers behind the addresses may not be directly identifiable, public data is enough to test some institutions' explanations.
This does not mean that every judgment by on-chain investigators is necessarily correct. On-chain records can prove when and how much an asset was transferred, but they do not necessarily prove on their own who controlled the address, how funds were accounted for within the exchange, or how the specific vulnerability was formed. Therefore, determining the nature of the incident still requires combining platform statements, technical investigations, and internal accounting records.
But for exchanges, on-chain information is no longer just a tool for accountability after the fact; it may also become an important basis for the market to judge risk. When public data differs significantly from an institution's initial explanation, the institution needs to provide clearer evidence and a timeline, rather than relying only on a brief verbal response.
From a crisis communication perspective, acknowledging at the first opportunity that an investigation has not yet been completed is a different approach from directly characterizing an abnormal signal as a false positive. The former preserves room for subsequent verification, while the latter may consume market trust before the facts are clarified. CoinDCX later also acknowledged that the investigation into the old infrastructure took some time and that the platform could have been more proactive in explaining the situation to the outside world.
For exchanges, transparency does not require publishing all technical details at the initial stage of an investigation, but it does require clearly distinguishing confirmed facts, inferences still awaiting verification, and measures the platform is taking.
Where did the 15.99 million USDT go? Tracking funds is not the same as recovering assets
According to an investigation by blockchain data analysis firm Bitquery, attackers transferred approximately 15.99 million USDT from about 40 TRON addresses associated with CoinDCX, of which about 15.82 million USDT came from a single address, accounting for the vast majority of the total loss. The investigation also showed that after being transferred out, the funds were split and moved through multiple addresses, with about $9.63 million entering deposit addresses associated with OKX, Binance, and Gate.
This fund path has significance in two respects.
First, the splitting of funds does not mean that on-chain tracking has become ineffective. Even if assets are transferred through multiple intermediate addresses, transaction records remain on the blockchain, and investigators can reconstruct part of the fund flow based on time, amount, and address correlations. If assets enter centralized trading platforms with customer identification mechanisms, the related deposit addresses may also provide clues for subsequent investigations.
But second, on-chain tracking is not the same as funds having been recovered. Assets entering a trading platform's deposit address only indicates that the funds flowed to the relevant address; it does not directly prove that the trading platform has identified the ultimate controller, nor does it prove that all assets have been frozen or returned. The final outcome still depends on platform cooperation, account identification, law enforcement procedures, and subsequent investigations.
For centrally issued stablecoins such as USDT, the issuer may, in compliance with its own policies and applicable legal requirements, freeze specific addresses. However, whether freezing is possible, when it occurs, and whether the frozen amount covers all losses all require support from specific evidence. It cannot be assumed that the recovery process has been completed simply because some funds entered exchanges.
This also shows that the impact of exchange security incidents often extends beyond the platform where the problem initially occurred. When funds flow into other exchanges, pass through intermediate wallets, or enter cross-chain channels, the incident may turn into a collaborative issue involving multiple institutions. Asset recovery depends not only on the victim platform's own investigative capabilities but also on information sharing and response speed across the industry.
For users, on-chain transparency can improve the observability of an incident, but it cannot eliminate the risk of asset loss. Public records help track funds, but they cannot replace ex ante risk control.
What kind of verification is still needed for the promise that user funds are unaffected?
CoinDCX emphasized that the loss this time will be borne by the company, that user account balances, current wallets, and trading systems have not been affected, and that the platform's deposit, withdrawal, and trading services also remain normal.
This statement is important, but the market still needs to distinguish three different levels: whether the balance displayed in user accounts is complete, whether the platform has actual assets sufficient to cover the relevant liabilities, and why the funds in the old address involved remained stranded for a long time.
Under the operating model of centralized exchanges, user account balances usually reflect the platform's internal accounting records and do not mean that every user asset corresponds one-to-one with an independent on-chain address. Therefore, even if user balances remain unchanged, it is still necessary to confirm the relationship between the platform's actual assets and user liabilities through internal accounting reconciliation, proof of assets, and independent audits.
CoinDCX stated that it will bear the losses, meaning the platform needs to use its own resources to absorb this funding gap. However, whether this commitment can gain sustained market recognition still depends on whether subsequent disclosures are sufficient, including how the losses are recorded, at which stage the collection service failed, why the old address continued to receive funds, and whether the relevant control measures have been repaired.
What is especially worth questioning is why the platform was able to continue crediting deposits to the old address but failed to promptly discover the anomaly that the funds were not collected. If a deposit has already entered a user account, but the corresponding assets remain for a long time at a risky address, then whether there is a sufficiently timely reconciliation mechanism between internal accounting and on-chain assets becomes a question that needs to be answered.
This is not a direct denial of CoinDCX's commitment to the safety of user funds, but rather an emphasis that after a loss involving tens of millions of dollars, merely stating that "user assets are unaffected" is not enough to complete the risk explanation. A more convincing approach is to provide verifiable accounting explanations, the results of system rectification, and control measures that can prove similar anomalies will no longer continue to accumulate.
Exchange security competition is shifting from wallet protection to full-process governance
The industry trend reflected by the CoinDCX incident is that the evaluation criteria for exchange security are shifting from single-point key protection to more complete operational governance.
In the past, when the market discussed exchange security, it often first focused on whether private keys were stored offline, whether hot wallets had limits set, whether multisignature was deployed, and whether cold wallet assets were isolated from the trading system. These measures remain important, but they mainly address some of the problems in asset custody and cannot automatically cover areas such as old address management, abnormal fund collection, reliance on third-party services, internal permissions, and incident communication.
A more mature security system should incorporate the entire process of wallets from creation, activation, and migration to deactivation into management. For addresses that have been abandoned but may still receive assets, the platform needs to clarify monitoring responsibilities, set abnormal balance thresholds, and trigger alerts and manual intervention when the automated collection service fails. If an old address no longer has the conditions for secure handling, the platform also needs to establish clear risk boundaries among user notifications, deposit identification, and asset disposal.
At the same time, automated systems should have the capabilities for fault detection, task backlog monitoring, and auditing of abnormal fund flows. Whether a system is operating normally should not be judged solely by whether the service is online; it is also necessary to confirm whether key business tasks are truly completed. For exchanges, the process of transferring funds from user deposit addresses to target wallets must have status records that can be independently verified.
Finally, security governance also needs to form a closed loop with external disclosure. When abnormal transactions occur, the platform must promptly protect existing assets and also explain to users as soon as possible the scope of the incident, confirmed losses, affected systems, and investigation progress. Timely communication cannot replace technical remediation, but it can reduce the trust cost caused by the continued spread of uncertainty.
CoinDCX's loss this time was approximately 15.99 million USDT. The amount is certainly noteworthy, but the long-term impact of the incident may depend more on how the platform explains and repairs the risks left by old infrastructure. For the entire crypto trading industry, this is also a reminder: security does not end when wallet migration is completed; rather, it is necessary to ensure that every address, service, and internal process that may still come into contact with user assets is within a clear scope of responsibility and control.
As exchanges continue to expand user scale, add asset types, and increase automation, true security capability is reflected not only in where funds are custodied, but also in whether anomalies can be promptly discovered, blocked, verified, and explained to the market in a verifiable manner after they occur. Whether CoinDCX can rebuild trust will ultimately depend on whether subsequent investigations and rectification can answer these questions, and not merely on who bears a single loss.
