Hack history / 2021 / Hack or exploit
Safe Dollar
Hack or exploit on Jun 27, 2021 · Reward Logic Flaw
SOURCES AGREE ON DATE AND LOSS · 4 SOURCES
Lost
$248K
sources: $200K to $250K
Returned
none listed
as the sources state it
Rank
#1,400
among thefts by dollars lost
What happened
On June 28, 2021, SafeDollar's staking pool on Polygon was exploited via incompatibility with deflationary tokens. The attacker used flash-loaned PLX to deplete the contract's actual balance to ~2 tokens while maintaining inflated deposit records, causing the reward formula to mint massive SDO amounts. These were sold for ~$248K in USDC and USDT.
Details
- Date
- Jun 27, 2021
- Kind
- Hack or exploit
- Method
- Reward Logic Flaw
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Polygon
- Audit (rekt.news)
- unaudited
Reported by
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Users of the Safe Wallet lose cumulative $2 million to address poisoning 2023 · Hack or exploit · $5M
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Users of the Safe Wallet lose cumulative $2 million to address poisoning 2023 · Hack or exploit · $5M
Former owner of a reportedly stolen Bored Ape files million-dollar lawsuit against OpenSea 2022 · Fraud · $300K
Cite this page
SwanBluechip, "Safe Dollar hack, Jun 27, 2021: $248K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht40a28dec92/ (data as of 2026-11-01).