According to CoinMeta, South Korean cryptocurrency exchanges Upbit and Bithumb have listed the SAND tokens of Sandbox as investment warning assets due to security vulnerabilities. On August 24, Upbit announced that due to unresolved security incidents that could lead to user losses, it had included SAND in the trading warning framework and suspended deposits and withdrawals for SAND starting from August 22. Bithumb also issued a similar warning on the same day, indicating that the confirmed security issues had not been fully resolved. Both exchanges stated that trading could still proceed during the review period.