EOS Lelego gambling DApp was exploited via a randomness vulnerability in November 2018. Attackers predicted the random number generation algorithm by using information from previous blockchain blocks. Lelego was one of eight EOS gambling platforms targeted in coordinated attacks using the same vector.

The attacker malisringho continually initiated 35 game requests to the EOS Lelego contract llgcontract1., eventually guessing 27 times, making a total profit of 6,282.5 EOS, and then successfully transferring 6,500 EOS to the Binance Exchange.