Hack history / 2019 / Hack or exploit
Fusion
Hack or exploit on Sep 28, 2019 · Private Key Compromised
SOURCES AGREE ON DATE AND LOSS · 2 SOURCES
Lost
$6.4M
dollars at the time
Returned
none listed
as the sources state it
Rank
#406
among thefts by dollars lost
What happened
Fusion's swap wallet ([address]) was compromised on September 28, 2019, with attackers stealing 10M native FSN and 3.5M ERC20 FSN tokens (~$6.4M total). Investigation determined the private key was stolen and suggested potential inside involvement. Some stolen tokens were wash-traded across exchanges before being frozen, causing FSN price to crash 50% within hours.
Details
- Date
- Sep 28, 2019
- Kind
- Hack or exploit
- Method
- Private Key Compromised
- How in
- Keys, accounts and infrastructure
- Target
- DeFi protocol
- Chains
- Ethereum
After the theft
- Frozen
- yes, amount not stated
“Some stolen tokens were wash-traded across exchanges before being frozen, causing FSN price to crash 50% within hours.” (DefiLlama)
Reported by
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Cite this page
SwanBluechip, "Fusion hack, Sep 28, 2019: $6.4M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht60f2263a14/ (data as of 2026-10-31).