Hack history / 2025 / Hack or exploit
Yearn Finance
Hack or exploit on Dec 16, 2025 · Donation Attack
SOURCES AGREE ON DATE AND LOSS · 4 SOURCES
Lost
$300K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,316
among thefts by dollars lost
What happened
Yearn Finance's legacy V1 TUSD vault was exploited for $300K via a donation attack. Attackers deposited Fulcrum sUSD tokens to artificially inflate share price, allowing Yearn TUSD tokens to be minted at minimal cost before the price collapsed.
Details
- Date
- Dec 16, 2025
- Kind
- Hack or exploit
- Method
- Donation Attack
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Ethereum
Related incidents
Yearn Ether 2025 · Hack or exploit · $9M
Yearn Finance accidentally swaps its entire Ip-yCRVv2 treasury, asks nicely for the money back 2023 · Hack or exploit · $1.5M
Yearn Finance 2023 · Hack or exploit · $11.6M
Yearn Finance 2023 · Hack or exploit · $1.4M
Yearn Finance 2021 · Hack or exploit · $11M
Yearn Finance accidentally swaps its entire Ip-yCRVv2 treasury, asks nicely for the money back 2023 · Hack or exploit · $1.5M
Yearn Finance 2023 · Hack or exploit · $11.6M
Yearn Finance 2023 · Hack or exploit · $1.4M
Yearn Finance 2021 · Hack or exploit · $11M
Cite this page
SwanBluechip, "Yearn Finance hack, Dec 16, 2025: $300K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht2a3bb25a81/ (data as of 2026-10-31).