Web3 Hacks in 2021

2021 incident records, sorted by known loss. The strongest mapped pattern is Access Control (43 rows); the largest tracked chain bucket is Ethereum ($1.9B).

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Incident records

Sorted by known reported loss first, then recency. Open the source before treating any summary as final.

Links
101 Growth DeFi $1.4M ethereum Flash Loan Attacks Details Source
102 UFCT $1.3M — Rugpull Details Source2
103 Monkey Kingdom $1.3M solana Phishing Attacks Details Source2
104 LaserSwap Cash $1.3M binance Rugpull Details Source
105 ApeRocket $1.3M bsc Flash Loan Attacks Details Source
106 Zenon Network $1.2M — Other Details Source2
107 Blizzard $1.1M — Other Details Source
108 Brinc Finance $1.1M — Other Details Source
109 Phantom Galaxies $1.1M ethereum Phishing Attacks Details
110 Ethereum Yield $1.1M ethereum Abandoned Details Source
111 CollectCoin $1.1M — Other Details Source2
112 NowSwap $1.1M ethereum Inconsistent Value in Code / Arithmetic Error / Other Details Source
113 Sentinel DVPN $1.0M — Access Control Attacks Details Source23
114 EVODeFi $1.0M bsc Flash Loan Attacks Details Source
115 Visor Finance $976K ethereum Flash Loan Attacks Details Source
116 Wault Finance $930K binance, bsc Flash Loan Attacks Details Source2
117 Armor.Fi $850K — Other Details Source2
118 AutoShark $823K bsc Flash Loan Attacks Details Source
119 BitBot $805K ethereum Rugpull Details Source
120 ChainSwap $800K bsc, ethereum Other / Bridge Logic Flaw Details Source2
121 Eco DeFi $794K — Access Control Attacks Details Source
122 ElectronDAO $729K — Rugpull Details Source
123 Meta Pets $709K — Rugpull Details
124 Meebits $700K — Other Details Source2
125 BitDao $686K ethereum Honeypot Details Source
126 Zerogoki $670K ethereum Oracle Manipulation & Price Manipulation Details Source
127 Lever $652K bsc Other / Borrow Logic Flaw Details Source
128 VitaDAO.com $627K ethereum Honeypot Details
129 Wild Credit $612K — Access Control Attacks Details Source2
130 AutoShark $580K bsc Reward Logic Flaw Details
131 Merlin Labs $550K binance, bsc Arithmetic Overflow & Underflow Attacks Details Source
132 Nerve Finance $537K bsc Other / Swap Logic Flaw Details Source2
133 Visor Finance $530K — Other Details Source23
134 Array Finance $516K — Flash Loan Attacks Details Source
135 Umbrella Network $505K — Other Details Source2
136 Visor Finance $505K ethereum Access Control Attacks Details Source
137 Impossible Finance $500K binance, bsc Flash Loan Attacks Details Source2
138 PolyDEX $500K polygon Reentrancy Details Source
139 SharedStake $500K ethereum Access Control Attacks Details Source
140 Seascape Network $500K ethereum Access Control Attacks Details Source
141 Union Capital $500K ethereum Rugpull Details Source
142 Stable Yield Credit $494K ethereum Honeypot Details Source
143 HSO $482K — Rugpull Details Source
144 Xdef finance $450K ethereum Rugpull Details Source
145 Pills for Sale $447K ethereum Honeypot Details
146 Dot Finance $430K bsc Oracle Manipulation & Price Manipulation Details Source
147 Unlock Protocol $416K — Access Control Attacks Details Source2
148 RAI Finance $414K — Other Details Source
149 WePiggy $400K — Other Details Source
150 Leverage X $400K ethereum Rugpull Details Source
151 ForceDAO $367K ethereum Other / Donation Attack Details Source2
152 Ploutoz Finance $365K bsc Flash Loan Attacks Details Source
153 Miss Universe NFT $360K — Rugpull Details Source23
154 PolBase Cash $354K ethereum Rugpull Details Source
155 THORChain DEX $350K ethereum Bridge Logic Flaw Details
156 Merlin $330K binance, bsc Incentive Rewards Exploit / Other / Arithmetic Error Details Source
157 Cake Lock $311K binance Rugpull Details Source
158 Rbase Finance $307K ethereum Rugpull Details Source
159 Glide Finance $300K elastos Other / Missing Input Validation Details Source
160 FASTSWAP $291K — Other Details Source
161 Sanshu Inu $280K — Other Details Source2
162 SynLev $278K ethereum Rugpull Details Source
163 Saddle Finance $276K — Other Details Source23
164 xWin Finance $270K bsc Other / Missing Input Validation Details Source2
165 Multi Financial $258K — Rugpull Details Source
166 PolyYeld Finance $250K polygon Other / Infinite Mint Details Source23
167 Safe Dollar $248K polygon Incentive Rewards Exploit / Other / Reward Logic Flaw Details Source
168 Elongate Deluxe $230K — Rugpull Details
169 Shadetech $225K ethereum Rugpull Details Source
170 Cubic Finance $217K ethereum Rugpull Details Source
171 Bep Finance $212K binance Rugpull Details Source
172 dYdX $211K — Other Details Source
173 SashimiSwap $210K ethereum Flash Loan Attacks Details Source2
174 Elastic Staking $209K ethereum Rugpull Details Source
175 Sifchain Finance $208K ethereum Honeypot Details
176 Pinecone Finance $200K bsc Other / Incorrect Share Accounting Details Source
177 DAFI Protocol $200K — Other Details Source2
178 Astronaut NFT $187K binance Rugpull Details Source
179 XDX Swap $176K huobi eco chain Other / Bridge Logic Flaw Details Source23
180 Casper DeFi $172K — Other Details Source2
181 Iron Finance $170K polygon Incorrect Share Accounting / Other Details Source2
182 Alpha Finance Lab $147K ethereum Oracle Manipulation & Price Manipulation Details Source
183 Tin Finance $137K binance Rugpull Details Source
184 Daedalus DAO $129K — Rugpull Details Source
185 MerchDAO $128K ethereum Honeypot Details Source
186 DeFiPie $125K bsc, ethereum Reentrancy Details Source
187 MoltenSwap $122K binance Rugpull Details
188 PancakeHunny $112K bsc Other / Incorrect Share Accounting Details Source23
189 INFI Governance and Utility Token $110K ethereum Rugpull Details Source
190 YZY DAO $106K ethereum Rugpull Details Source
191 SushiSwap $104K ethereum Swap Logic Flaw Details
192 Yearn Machine Learning $100K ethereum Rugpull Details Source
193 Formation.Fi $100K — Other Details Source
194 Aphrodite Protocol $97K ethereum Rugpull Details Source
195 Safe Dollar $95K polygon Other Details Source2
196 Nifity $93K ethereum Rugpull Details Source
197 NeedForSpeed Finance $82K ethereum Rugpull Details Source
198 OracleSwapToken $77K ethereum Honeypot Details
199 Sakura DeFi $76K ethereum Rugpull Details Source
200 Bio Farm $73K ethereum Rugpull Details Source

Notes

Loss totals use parsed USD values only; unknown or unparseable losses are not guessed. Attack-class links are added only when the root cause is clear enough to map.

Full hack database Filter every tracked incident by chain, date, loss size, and technique. Attack class library Move from incident examples to exploit mechanics and review checklists. Largest crypto hacks Compare this year against the highest-loss incidents in the database.