Two-Key Breach Could Put $91 Billion in USDT at Risk, Report Finds

A report has warned that a breach involving two keys could give hackers control of $91 billion in Tether’s USDT, highlighting the importance of assessing both blockchain security and the assets backing a stablecoin. The findings come as a rating agency introduces a framework that combines conventional Wall Street financial auditing with Web3 code reviews. The approach is designed to examine off-chain reserves alongside on-chain security, offering a broader view of potential risks affecting digital assets. The report’s warning centers on the possible consequences of a compromise involving two keys, rather than on the value or operation of any other cryptocurrencies. USDT is the relevant market asset for investors tracking Tether’s reserves and smart-contract security. CoinDesk reported the findings on September 7, 2026.