Hack history / 2017 / Hack or exploit
Tether
Hack or exploit on Nov 19, 2017 · Private Key Compromised
SOURCES AGREE ON DATE AND LOSS · 2 SOURCES
Lost
$31M
dollars at the time
Returned
none listed
as the sources state it
Rank
#154
among thefts by dollars lost
What happened
On November 19, 2017, $30.95M USDT was removed from Tether's Treasury wallet and sent to an unauthorized address. Tether blocked the tokens and marked them as non-redeemable, preventing their circulation. Tether worked with the Omni Foundation to implement protocol upgrades allowing eventual token reclamation.
Details
- Date
- Nov 19, 2017
- Kind
- Hack or exploit
- Method
- Private Key Compromised
- How in
- Keys, accounts and infrastructure
- Target
- Token
- Chains
- Bitcoin
Reported by
Related incidents
Cite this page
SwanBluechip, "Tether hack, Nov 19, 2017: $31M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htdb987f1225/ (data as of 2026-10-31).