Hack history / 2021 / Hack or exploit
THORChain DEX
Hack or exploit on Jun 29, 2021 · Bridge Logic Flaw
IN REVIEWSOURCES DISAGREE ON DATE OR LOSS · 2 SOURCES
Lost
$350K
sources: $140K to $350K
Returned
none listed
as the sources state it
Rank
#1,267
among thefts by dollars lost
What happened
On June 29, 2021, THORChain was exploited via a same-symbol deposit flaw where ERC20 tokens with the 'ETH' symbol were incorrectly identified as genuine ETH, allowing attackers to exchange fake ETH for other tokens and steal approximately $350K. This was the first of three consecutive attacks on THORChain.
In review: sources disagree on the loss.
Details
- Date
- Jun 29, 2021
- Kind
- Hack or exploit
- Method
- Bridge Logic Flaw
- How in
- Bridge and cross-chain
- Target
- DeFi protocol
- Chains
- Ethereum
Reported by
Related incidents
THORChain DEX 2026 · Hack or exploit · $10.7M
Thorchain founder exploited for $1.35 million 2025 · Hack or exploit · $1.4M
THORChain 2022 · Hack or exploit · undisclosed
THORChain 2021 · Phishing · $76K
THORChain DEX 2021 · Hack or exploit · $8M
Thorchain founder exploited for $1.35 million 2025 · Hack or exploit · $1.4M
THORChain 2022 · Hack or exploit · undisclosed
THORChain 2021 · Phishing · $76K
THORChain DEX 2021 · Hack or exploit · $8M
Cite this page
SwanBluechip, "THORChain DEX hack, Jun 29, 2021: $350K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htd6c2f224b2/ (data as of 2026-10-31).