A Hyperliquid trader has suffered a massive $21 million loss after a private key leak gave attackers full control over their wallet.
Quick Summary – TLDR:
- A Hyperliquid user lost $21 million due to a compromised private key, not a platform vulnerability.
- Stolen funds included 17.75 million DAI and 3.11 million MSYRUPUSDP, quickly moved to Ethereum.
- The incident was isolated, not affecting Hyperliquid’s smart contracts or infrastructure.
- Raises serious concerns over private key security and user-side vulnerabilities in DeFi.
What Happened?
A wallet associated with decentralized exchange Hyperliquid was drained of nearly $21 million in digital assets. According to blockchain security firm PeckShield, the wallet’s private key was compromised, allowing an attacker to transfer the assets to the Ethereum network. The incident did not result from a protocol or smart contract flaw, but from a breach of user-side security.
#PeckShieldAlert A victim 0x0cdC…E955 lost ~$21M worth of cryptos on #Hyperliquid due to a private key leak.
— PeckShieldAlert (@PeckShieldAlert) October 10, 2025
The hacker has bridged the stolen funds to #Ethereum, including 17.75M $DAI & 3.11M $MSYRUPUSDP. pic.twitter.com/yZUMM6xL5f
Hyperliquid Trader Targeted in Isolated Wallet Attack
The wallet, identified onchain as “0x0cdC…E955,” saw funds vanish after a private key compromise. The attacker seized control and bridged the assets to Ethereum, moving 17.75 million DAI and roughly 3.11 million MSYRUPUSDP.
On-chain data suggests the hacker dispersed the stolen funds across multiple wallet addresses, a common tactic used to obfuscate transactions and avoid traceability. The timing is notable: the wallet had just closed a large trading position, indicating the attacker may have been monitoring it prior to the breach.
PeckShield emphasized that this was an isolated incident, affecting a single user and not due to any vulnerability in the Hyperliquid protocol.
The Ongoing Threat of Private Key Theft
A private key functions as the master password for a crypto wallet. With it, anyone can move or access all funds within the wallet. In 2025 alone, over $2 billion worth of crypto assets have been stolen through private key compromises and related exploits, according to The Block.
While DeFi platforms like Hyperliquid pride themselves on decentralized architecture and fast execution, security still hinges on individual user practices. Common ways private keys are compromised include phishing, malware, and poor storage methods.
Experts urge users to consider stronger protective options such as:
- Hardware wallets for offline storage.
- Multi-signature authentication for transaction approval.
- Cold storage solutions for large asset holdings.
Hyperliquid’s Broader Challenges
Although the platform itself was not breached, the event puts a spotlight on Hyperliquid during a time when it’s already under market pressure. The decentralized perpetual exchange currently holds around 38% of the DeFi derivatives market, but faces stiff competition from rising platforms like Aster and Lighter.
In response to recent challenges, Hyperliquid has launched a permissionless spot-quote feature on its mainnet. This update allows stable asset deployers to list tokens as quote assets without centralized approval. It’s a strategic move aimed at decentralizing token listings and revitalizing trading activity.
SQ Magazine Takeaway
This story hits hard. I can’t stress enough how important it is to protect your private keys. The scary part? Even the most robust trading platforms can’t save you from bad key management. We’re reminded once again that in crypto, you are your own bank. And with that comes serious responsibility. Whether you’re an active trader or a long-term holder, don’t cut corners with security. Use hardware wallets, stay alert for phishing scams, and always think twice before signing anything online. One slip is all it takes.
