EosRoyale gambling platform was exploited via a prior-block randomness vulnerability on October 26, 2018. Attackers calculated future random numbers by analyzing information from previous blocks, predicting game outcomes. 11,000 EOS were stolen from the operational wallet, valued at approximately $60,000 at the time.

Vulnerability of the random number generator, the attacker can try to calculate the future number of random number generator algorithms by using the information of the previous block and stolen $60,000 from the EosRoyale wallet.