Hack history / 2021 / Hack or exploit
Visor Finance
Hack or exploit on Dec 21, 2021 · Contract Vulnerability
ATTACK TX CONFIRMED ON CHAININ REVIEWSOURCES AGREE ON DATE AND LOSS · 4 SOURCES
Lost
$8.2M
dollars at the time
Returned
none listed
as the sources state it
Rank
#341
among thefts by dollars lost
What happened
Uniswap V3 liquidity management protocol Visor Finance was hacked again. Hackers took advantage of the loopholes to withdraw more than 8.8 million VISRs and sold them on Uniswap, causing the VISR tokens to plummet by nearly 95% and profit over 120 ETH through Tornado Cash. Money laundering. According to SlowMist analysis, this attack is due to a flaw in the RewardsHypervisor contract when checking the permissions of the user's recharge, causing the attacker to construct a malicious contract to arbitrarily cast mortgage credentials. Prior to this June, Visor Finance was also hacked and lost more than US$500,000.
In review: possible duplicate within one source.
Details
- Date
- Dec 21, 2021
- Kind
- Hack or exploit
- Method
- Contract Vulnerability
- How in
- Smart contract bug
- Target
- not stated
- Chains
- Ethereum
- Audit (rekt.news)
- unaudited
Related incidents
Visor Finance 2021 · Hack or exploit · $976K
Visor Finance 2021 · Hack or exploit · $505K
Compound 2021 · Hack or exploit · $68.8M
pNetwork 2021 · Hack or exploit · $12M
bEarn Fi 2021 · Hack or exploit · $11M
Visor Finance 2021 · Hack or exploit · $505K
Compound 2021 · Hack or exploit · $68.8M
pNetwork 2021 · Hack or exploit · $12M
bEarn Fi 2021 · Hack or exploit · $11M
Cite this page
SwanBluechip, "Visor Finance hack, Dec 21, 2021: $8.2M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht9cc15d2db0/ (data as of 2026-11-01).