cryptonist

Hacks

Crypto hacks in 2020

Data as of 3 October 2026

46 recorded incidents in 2020 took $4.0B in total. The largest was LuBian, $3.5B. That is 3.6% of all incidents in DefiLlama's record and 18.9% of the value lost. Amounts are the losses DefiLlama records, and its record does not say whether they are before or after any recovery. Data as of 3 October 2026.

By class of failure, 2020

  • Key Compromise $3.8B lost
    8 incidents
  • Oracle Manipulation $66.8M lost
    8 incidents
  • Frontend & Infrastructure $18.4M lost
    7 incidents
  • Protocol Logic $809K lost
    5 incidents
  • Reentrancy $35.3M lost
    5 incidents
  • Token & Share Accounting $10.7M lost
    5 incidents
  • Access Control $1.0M lost
    3 incidents
  • Bridge & Cross-Chain $7.3M lost
    2 incidents
  • Input Validation $19.7M lost
    1 incidents
  • Rugpull $12.5M lost
    1 incidents
  • Social Engineering $271K lost
    1 incidents
Incidents in 2020 by class, with value lost in millions of US dollars. Source: DefiLlama, retrieved 3 October 2026.

Incidents in 2020

Incidents in 2020. Newest first. Source: DefiLlama.
DateIncidentClass TechniqueChainsAmount
2020-12-29 Cover Protocol Token & Share Accounting Arithmetic Error Ethereum $9.4M
2020-12-28 LuBian Key Compromise Weak Key Generation Bitcoin $3.5B
2020-12-26 Altilly Frontend & Infrastructure API Key Compromised Multiple $750K
2020-12-24 Livecoin Frontend & Infrastructure API Key Compromised Multiple $3.3M
2020-12-21 Exmo Key Compromise Hot Wallet Key Compromised Multiple $10.5M
2020-12-18 Warp Protocol Oracle Manipulation Spot Price Manipulation Ethereum $7.8M
2020-12-14 Nexus Mutual Frontend & Infrastructure Key Leaked via Infrastructure Ethereum $8.0M
2020-12-08 Aeternity Key Compromise Validator Key Compromised Aeternity $5.2M
2020-12-02 Compounder Finance Rugpull Admin Drain Ethereum $12.5M
2020-11-30 SushiSwap Access Control Improper Access Control Ethereum $15K
2020-11-22 Pickle Input Validation Missing Input Validation Ethereum $19.7M
2020-11-17 Origin Protocol Reentrancy Reentrancy Ethereum $7.7M
2020-11-16 CheeseBank Oracle Manipulation Spot Price Manipulation Ethereum $3.3M
2020-11-14 ValueDefi Oracle Manipulation Spot Price Manipulation Ethereum $7.4M
2020-11-12 Akropolis Reentrancy Reentrancy Ethereum $2.0M
2020-11-08 Grin Key Compromise Validator Key Compromised Grin $0
2020-11-06 Ledger Social Engineering Phishing Multiple $271K
2020-11-02 Axion Token & Share Accounting Infinite Mint Ethereum $500K
2020-10-30 EtherCrash Key Compromise Hot Wallet Key Compromised Ethereum $2.5M
2020-10-26 Harvest Finance Oracle Manipulation Spot Price Manipulation Ethereum $24.0M
2020-10-11 WLEO Token & Share Accounting Infinite Mint Ethereum $42K
2020-09-29 KuCoin Key Compromise Hot Wallet Key Compromised Ethereum $281.0M
2020-09-28 Eminence Oracle Manipulation Spot Price Manipulation Ethereum $15.0M
2020-09-20 Soda Protocol Protocol Logic Withdrawal Logic Flaw Ethereum $160K
2020-09-10 Coral Reentrancy Reentrancy EOS $420K
2020-09-10 SYFI Token & Share Accounting Arithmetic Error Ethereum $250K
2020-09-08 Eterbase Key Compromise Hot Wallet Key Compromised Bitcoin, Ethereum, XRPL, Tezos, Algorand, Tron $5.4M
2020-08-18 OKEx Bridge & Cross-Chain Forged Proof Ethereum Classic $5.6M
2020-08-06 Ethereum Classic Bridge & Cross-Chain Forged Proof Ethereum Classic $1.7M
2020-08-04 Opyn Protocol Logic Withdrawal Logic Flaw Ethereum $371K
2020-07-31 2gether Frontend & Infrastructure Key Leaked via Infrastructure Bitcoin, Ethereum $1.2M
2020-07-11 Cashaa Frontend & Infrastructure Key Leaked via Infrastructure Bitcoin $3.1M
2020-07-01 Vether Access Control Improper Access Control Ethereum $450K
2020-06-28 Balancer Token & Share Accounting Incorrect Share Accounting Ethereum $500K
2020-06-18 Bancor V3 Access Control Improper Access Control Ethereum $545K
2020-04-25 Hegic Protocol Logic Deposit Logic Flaw Ethereum $29K
2020-04-19 dForce Lending Reentrancy Reentrancy Ethereum $25.0M
2020-04-18 Uniswap V1 Reentrancy Reentrancy Ethereum $220K
2020-04-08 Bisq Protocol Logic Withdrawal Logic Flaw Bitcoin $248K
2020-03-12 MakerDAO Oracle Manipulation Stale Oracle Price Ethereum $8.3M
2020-02-18 Ooki Oracle Manipulation Spot Price Manipulation Ethereum $650K
2020-02-15 Ooki Oracle Manipulation Spot Price Manipulation Ethereum $350K
2020-02-12 Trinity Wallet Frontend & Infrastructure CDN Compromise Iota $2.0M
2020-02-05 Altsbit Frontend & Infrastructure Key Leaked via Infrastructure Bitcoin, Ethereum $70K
2020-02-03 LuckLambo104 Protocol Logic Unknown Tron $2K
2020-01-23 Bitcoin Gold Key Compromise Validator Key Compromised Bitcoin Gold $70K

Source: DefiLlama, retrieved 3 October 2026, under its open methodology. Figures are a dated snapshot, not a live feed.