A massive cyberattack struck several European banking systems on June 30, 2025, disrupting transactions across Germany, France, and Italy. Cybersecurity experts attribute the attack to a sophisticated ransomware group, with hackers demanding millions in cryptocurrency. The European Central Bank (ECB) confirmed that sensitive data may have been compromised, though efforts are underway to restore services. The attack has raised alarms about the vulnerability of global financial infrastructure, with implications for Nigerian banks integrated into international networks. Governments have issued warnings to citizens about potential fraud attempts following the breach. Interpol is coordinating with affected countries to track the perpetrators. Markets experienced volatility as investor confidence waned. This incident underscores the urgent need for enhanced cybersecurity measures worldwide, with experts predicting more attacks if defenses are not strengthened.