Incident Overview
July 19, 2025 — Indian exchange CoinDCX suffered a $44 million exploit due to a server breach targeting an internal liquidity account; user funds were not affected and operations continue normally.
The breach occurred at 4 a.m. IST on July 19 when an attacker gained unauthorized access to a CoinDCX liquidity provisioning account used on a partner exchange. The company attributed the incident to a sophisticated server-level compromise, not a smart contract flaw.
Funds were routed through Tornado Cash and bridged between Solana and Ethereum before being dispersed across several wallets. The attacker initially masked their activity with a small Tornado Cash transfer, later conducting larger outflows. Although CoinDCX delayed disclosure by ~17 hours to conduct internal analysis, it has since confirmed full reimbursement from its treasury and is collaborating with CERT-In and blockchain forensics firms.
A Recovery Bounty Program is being launched, and affected wallets were identified by ZachXBT and Arkham.
Incident Report
Protocol Information
Market Context at Time of Hack
What the Attacker Needed to Succeed
Understanding the prerequisites for this type of attack helps auditors identify protocols that are most at risk and helps developers build better defenses.
What Auditors Should Check
If you're auditing a protocol with similar architecture to CoinDCX, these are the critical security checks that could have prevented this incident (July 2025).
- Verify all logic paths related to Access Control are guarded by proper access controls and input validation - see the Access Control Attacks attack class for patterns
- Review privileged functions (owner, admin, governance) for potential abuse vectors - centralization risks should be documented and bounded with timelocks or multi-sigs
Master these auditing techniques with hands-on labs and real exploit scenarios in the Smart Contract Hacking course.
Free TrialRelated Attack Classes
The technique used in this hack maps to these vulnerability classes in our security curriculum:
Sources & References
Learn to Prevent the Next CoinDCX
The CoinDCX hack is one of many attacks that skilled auditors are trained to detect before deployment. Master real exploit patterns and defense techniques with hands-on Web3 security training.