Ledger All ledgers
Crypto failures in 2021
127 crypto hacks, exploits and thefts in 2021, with $2.87bn in known losses.
$2.87bn lost across 127 incidents
The largest crypto hack of 2021 was Poly Network, at $611.0m. $0 is recorded as returned or repaid.
Jan
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Nov
Dec
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 30 Dec 2021 | SashimiSwap | $210,000 | DeFi Protocol | Swap Logic Flaw | — |
| 23 Dec 2021 | Monkey Kingdom | $1.3m | NFTfi | Phishing | — |
| 21 Dec 2021 | Gamma | $4.5m | DeFi Protocol | Arithmetic Error | — |
| 21 Dec 2021 | Bent Finance | $1.8m | DeFi Protocol | Backdoor Contract | — |
| 21 Dec 2021 | Gamma | $8.2m | DeFi Protocol | Reentrancy | — |
| 18 Dec 2021 | Grim Finance | $30.0m | DeFi Protocol | Reentrancy | — |
| 14 Dec 2021 | NerveBridge | $537,000 | DeFi Protocol | Swap Logic Flaw | — |
| 13 Dec 2021 | Vulcan Forged | $140.0m | DeFi Protocol | Hot Wallet Key Compromised | — |
| 11 Dec 2021 | AscenDEX | $77.0m | CEX | Hot Wallet Key Compromised | — |
| 08 Dec 2021 | 8ightDAO | $1.8m | DeFi Protocol | Phishing | — |
| 05 Dec 2021 | Pizza DeFi | $5.0m | DeFi Protocol | Arithmetic Error | — |
| 04 Dec 2021 | BitMart | $196.0m | CEX | Hot Wallet Key Compromised | — |
| 03 Dec 2021 | Polygon | $2.0m | DeFi Protocol | Improper Access Control | — |
| 02 Dec 2021 | Badger DAO | $120.0m | DeFi Protocol | CDN Compromise | — |
| 30 Nov 2021 | MonoX | $31.4m | DeFi Protocol | Swap Logic Flaw | — |
| 28 Nov 2021 | Visor Finance | $975,720 | DeFi Protocol | Spot Price Manipulation | — |
| 27 Nov 2021 | Lever | $652,000 | DeFi Protocol | Borrow Logic Flaw | — |
| 25 Nov 2021 | Snowdog | $18.1m | DeFi Protocol | Liquidity Rug | — |
| 23 Nov 2021 | Ploutoz | $365,000 | DeFi Protocol | Spot Price Manipulation | — |
| 19 Nov 2021 | Phantom Galaxies | $1.1m | NFTfi | Malware | — |
| 15 Nov 2021 | Nerve | $537,000 | DeFi Protocol | Swap Logic Flaw | — |
| 07 Nov 2021 | ChainSwap | $4.4m | DeFi Protocol | Caller Impersonation | — |
| 05 Nov 2021 | Ooki | $55.0m | DeFi Protocol | Phishing | — |
| 03 Nov 2021 | Vesper Finance | $3.4m | DeFi Protocol | Spot Price Manipulation | — |
| 03 Nov 2021 | Squid Games | $3.4m | Gaming | Liquidity Rug | — |
| 30 Oct 2021 | BXH | $139.0m | DeFi Protocol | Private Key Compromised | — |
| 29 Oct 2021 | AnubisDAO | $60.0m | DeFi Protocol | Admin Drain | — |
| 29 Oct 2021 | AutoShark | $580,000 | DeFi Protocol | Reward Logic Flaw | — |
| 27 Oct 2021 | CREAM Lending | $130.0m | DeFi Protocol | Spot Price Manipulation | — |
| 23 Oct 2021 | Alpha Homora | $147,000 | DeFi Protocol | Spot Price Manipulation | — |
| 18 Oct 2021 | Glide Finance | $300,000 | DeFi Protocol | Missing Input Validation | — |
| 14 Oct 2021 | Indexed Finance | $16.0m | DeFi Protocol | Spot Price Manipulation | — |
| 08 Oct 2021 | Mirror | $90.0m | DeFi Protocol | Improper Access Control | — |
| 04 Oct 2021 | pNetwork | $13.0m | DeFi Protocol | Spoofed Event Log | — |
| 01 Oct 2021 | Coinbase | — | CEX | Session Key Compromised | — |
| 29 Sept 2021 | Compound V2 | $147.0m | DeFi Protocol | Arithmetic Error | — |
| 21 Sept 2021 | Vee Finance | $34.0m | DeFi Protocol | Spot Price Manipulation | — |
| 17 Sept 2021 | JayPegs Automart | $3.1m | DeFi Protocol | Frontend Compromise | — |
| 15 Sept 2021 | NowSwap | $1.1m | DeFi Protocol | Arithmetic Error | — |
| 12 Sept 2021 | Zabu Finance | $3.2m | DeFi Protocol | Deposit Logic Flaw | — |
| 04 Sept 2021 | DAO Maker Vesting | $4.0m | DeFi Protocol | Improper Access Control | — |
| 03 Sept 2021 | Siren | $3.5m | DeFi Protocol | Reentrancy | — |
| 30 Aug 2021 | CREAM Lending | $18.8m | DeFi Protocol | Reentrancy | — |
| 29 Aug 2021 | xToken | $4.5m | DeFi Protocol | Spot Price Manipulation | — |
| 29 Aug 2021 | Bilaxy | $21.7m | CEX | Hot Wallet Key Compromised | — |
| 25 Aug 2021 | Dot.Finance | $429,724 | DeFi Protocol | Spot Price Manipulation | — |
| 19 Aug 2021 | Pinecone Finance | $200,000 | DeFi Protocol | Incorrect Share Accounting | — |
| 19 Aug 2021 | Liquid Global | $91.3m | CEX | Hot Wallet Key Compromised | — |
| 19 Aug 2021 | Solend | $16,000 | DeFi Protocol | Improper Access Control | — |
| 17 Aug 2021 | SurgeBNB | $5.0m | DeFi Protocol | Reentrancy | — |
| 15 Aug 2021 | Ref Finance | $3.2m | DeFi Protocol | Missing Input Validation | — |
| 13 Aug 2021 | NEKO | $2.2m | DeFi Protocol | Improper Access Control | — |
| 13 Aug 2021 | Acala Network | $1.6m | DeFi Protocol | Infinite Mint | — |
| 12 Aug 2021 | DAO Maker Vesting | $7.0m | DeFi Protocol | Improper Access Control | — |
| 10 Aug 2021 | Poly Network | $611.0m | DeFi Protocol | Improper Access Control | — |
| 10 Aug 2021 | Punk Protocol | $8.9m | DeFi Protocol | Delegatecall Hijack | — |
| 08 Aug 2021 | Zerogoki | $670,000 | DeFi Protocol | Oracle Misconfiguration | — |
| 04 Aug 2021 | WaultSwap | $930,000 | DeFi Protocol | Risk Parameter Abuse | — |
| 03 Aug 2021 | Popsicle Finance | $20.7m | DeFi Protocol | Reward Logic Flaw | — |
| 30 Jul 2021 | Levyathan | $1.5m | DeFi Protocol | Key Stored Publicly | — |
| 28 Jul 2021 | PolyYeld Finance | $250,000 | DeFi Protocol | Infinite Mint | — |
| 22 Jul 2021 | THORChain DEX | $8.0m | DeFi Protocol | Withdrawal Logic Flaw | — |
| 16 Jul 2021 | Bunny | $2.4m | DeFi Protocol | Unbacked Mint | — |
| 15 Jul 2021 | THORChain DEX | $5.0m | DeFi Protocol | Bridge Logic Flaw | — |
| 15 Jul 2021 | Bondly | $5.9m | DeFi Protocol | Phishing | — |
| 14 Jul 2021 | ApeRocket | $1.3m | DeFi Protocol | Reward Logic Flaw | — |
| 13 Jul 2021 | DeFiPie | $124,999 | DeFi Protocol | Reentrancy | — |
| 11 Jul 2021 | ChainSwap Bridge | $4.4m | DeFi Protocol | Bridge Logic Flaw | — |
| 10 Jul 2021 | Multichain | $7.9m | CEX | Weak Key Generation | — |
| 03 Jul 2021 | Haven Protocol | $8.2m | DeFi Protocol | Infinite Mint | — |
| 02 Jul 2021 | ChainSwap | $800,000 | DeFi Protocol | Bridge Logic Flaw | — |
| 02 Jul 2021 | XDX Swap | $176,000 | DeFi Protocol | Bridge Logic Flaw | — |
| 29 Jun 2021 | Merlin | $330,000 | DeFi Protocol | Arithmetic Error | — |
| 29 Jun 2021 | THORChain DEX | $350,000 | DeFi Protocol | Bridge Logic Flaw | — |
| 28 Jun 2021 | Safe Dollar | $248,000 | DeFi Protocol | Reward Logic Flaw | — |
| 25 Jun 2021 | xWin Finance | $270,000 | DeFi Protocol | Missing Input Validation | — |
| 24 Jun 2021 | SharedStake | $500,000 | DeFi Protocol | Improper Access Control | — |
| 23 Jun 2021 | StableMagnet | $27.0m | DeFi Protocol | Backdoor Contract | — |
| 22 Jun 2021 | Eleven Finance | $4.5m | DeFi Protocol | Withdrawal Logic Flaw | — |
| 21 Jun 2021 | StakeHound / Fireblocks | $72.0m | DeFi Protocol | Key Brute Forced | — |
| 21 Jun 2021 | Impossible Finance | $500,000 | DeFi Protocol | Spot Price Manipulation | — |
| 20 Jun 2021 | Polydex | $500,000 | DeFi Protocol | Reentrancy | — |
| 19 Jun 2021 | Visor Finance | $504,845 | DeFi Protocol | Improper Access Control | — |
| 16 Jun 2021 | Alchemix V2 | $6.5m | DeFi Protocol | Borrow Logic Flaw | — |
| 10 Jun 2021 | EvoDefi | $1.0m | DeFi Protocol | Reward Logic Flaw | — |
| 07 Jun 2021 | 88mph | — | DeFi Protocol | Missing Input Validation | — |
| 06 Jun 2021 | Fetch.ai | $2.6m | CEX | Private Key Compromised | — |
| 03 Jun 2021 | Hunny Finance | — | DeFi Protocol | Incorrect Share Accounting | — |
| 29 May 2021 | Belt Finance | $6.3m | DeFi Protocol | Incorrect Share Accounting | — |
| 28 May 2021 | BurgerSwap | $7.2m | DeFi Protocol | Reentrancy | — |
| 26 May 2021 | Merlin | $680,000 | DeFi Protocol | Reward Logic Flaw | — |
| 26 May 2021 | Merlin | $550,000 | DeFi Protocol | Rounding Error | — |
| 24 May 2021 | AutoShark | $822,800 | DeFi Protocol | Reward Logic Flaw | — |
| 23 May 2021 | Bogged Finance | $3.0m | DeFi Protocol | Arithmetic Error | — |
| 19 May 2021 | Bunny | $45.0m | DeFi Protocol | Spot Price Manipulation | — |
| 18 May 2021 | Venus Protocol | $100.0m | DeFi Protocol | Spot Price Manipulation | — |
| 17 May 2021 | FinNexus | $7.0m | DeFi Protocol | Private Key Compromised | — |
| 17 May 2021 | BearnFi | $18.0m | DeFi Protocol | Withdrawal Logic Flaw | — |
| 14 May 2021 | flash.sx / vaults.sx | $13.0m | DeFi Protocol | Reentrancy | — |
| 12 May 2021 | xToken | $24.0m | DeFi Protocol | Spot Price Manipulation | — |
| 08 May 2021 | Rari Capital | $10.0m | DeFi Protocol | Arbitrary External Call | — |
| 07 May 2021 | ValueDefi | $11.0m | DeFi Protocol | Arithmetic Error | — |
| 05 May 2021 | ValueDefi | $10.0m | DeFi Protocol | Improper Access Control | — |
| 02 May 2021 | Spartan | $30.5m | DeFi Protocol | Incorrect Share Accounting | — |
| 28 Apr 2021 | Uranium Finance | $57.2m | DeFi Protocol | Arithmetic Error | — |
| 19 Apr 2021 | EasyFi | $59.0m | DeFi Protocol | Malware | — |
| 12 Apr 2021 | PancakeSwap | $1.8m | DeFi Protocol | Improper Access Control | — |
| 05 Apr 2021 | Polkatrain | $3.0m | DeFi Protocol | Reward Logic Flaw | — |
| 04 Apr 2021 | Force DAO | $367,000 | DeFi Protocol | Donation Attack | — |
| 20 Mar 2021 | Turtle Dex | $2.5m | DeFi Protocol | Liquidity Rug | — |
| 16 Mar 2021 | Iron Finance | $170,000 | DeFi Protocol | Incorrect Share Accounting | — |
| 15 Mar 2021 | DEUS Finance | $3.0m | DeFi Protocol | Spot Price Manipulation | — |
| 15 Mar 2021 | PancakeSwap / Cream Finance | — | DeFi Protocol | DNS Hijack | — |
| 15 Mar 2021 | TSD (True Seigniorage Dollar) | $7.1m | DeFi Protocol | Malicious Proposal | — |
| 14 Mar 2021 | Roll | $5.7m | DeFi Protocol | Hot Wallet Key Compromised | — |
| 09 Mar 2021 | DODO AMM | $3.8m | DeFi Protocol | Improper Access Control | — |
| 05 Mar 2021 | Paid Network | $27.0m | DeFi Protocol | Infinite Mint | — |
| 04 Mar 2021 | Meerkat Finance | $31.0m | DeFi Protocol | Admin Drain | — |
| 01 Mar 2021 | Seascape | $500,000 | DeFi Protocol | Private Key Compromised | — |
| 27 Feb 2021 | Furucombo | $14.0m | DeFi Protocol | Delegatecall Hijack | — |
| 13 Feb 2021 | Alpha Finance | $37.5m | DeFi Protocol | Borrow Logic Flaw | — |
| 12 Feb 2021 | BT Finance | $1.5m | DeFi Protocol | Spot Price Manipulation | — |
| 09 Feb 2021 | Growth DeFi | $1.4m | DeFi Protocol | Missing Input Validation | — |
| 05 Feb 2021 | Yearn Finance | $11.0m | DeFi Protocol | Spot Price Manipulation | — |
| 01 Feb 2021 | Cryptopia | $45,000 | CEX | Hot Wallet Key Compromised | — |
| 27 Jan 2021 | SushiSwap | $103,842 | DeFi Protocol | Swap Logic Flaw | — |
| 25 Jan 2021 | Badger DAO | $103,842 | DeFi Protocol | Swap Logic Flaw | — |
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Crypto failures in 2021”, data to 2 November 2026, https://bitminer.io/ledger/failures/2021/. How this is built