A hacker exploited a critical vulnerability in the Dogecoin network, causing 69% of its nodes to crash. Andreas Kohl, co-founder of Bitcoin sidechain Sequentia, utilized an old laptop to execute the attack, which was made possible by a flaw discovered by researcher Tobias Ruck. The vulnerability, dubbed "DogeReaper," allows anyone to remotely crash Dogecoin nodes, potentially threatening the entire network's stability.