Hack history / 2026 / Hack or exploit
USM
Hack or exploit on Aug 9, 2026 · Arithmetic Error
SOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$136K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,608
among thefts by dollars lost
What happened
On August 9, 2026, USM on Ethereum was exploited via an arithmetic error in its token accounting logic, resulting in a loss of approximately $136,000. Flagged by SlowMist; no dedicated post-mortem has been published.
Details
- Date
- Aug 9, 2026
- Kind
- Hack or exploit
- Method
- Arithmetic Error
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Ethereum
Reported by
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Cite this page
SwanBluechip, "USM hack, Aug 9, 2026: $136K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht6c12b90fcf/ (data as of 2026-10-31).