According to CoinMeta, South Korea's largest and second-largest cryptocurrency exchanges, Upbit and Bithumb, have both suspended the deposit and withdrawal services for SAND. Upbit stated that on August 22, a suspected security issue was detected in the SAND network, which could lead to increased price fluctuations, and warned users to trade with caution. Bithumb also issued a related risk warning. Currently, the spot trading of SAND on both exchanges is still proceeding normally.