Cybersecurity agencies from nine countries, including the United States, have jointly issued a warning about Russian state-sponsored hackers targeting critical infrastructure networks by exploiting vulnerable routers. These attacks often involve poorly configured devices, highlighting the need for robust security measures. The warnings come as Russian hackers continue to pose a significant threat to global critical infrastructure, with a history of using such tactics to gain unauthorized access. Specific technical details of the vulnerabilities exploited are not provided, but the warning emphasizes the importance of proper router configuration and security protocols. The joint warning is a rare instance of international cooperation on cybersecurity, underscoring the severity of the threat1. This matters to security practitioners because understanding the tactics used by Russian state hackers can inform defense strategies and help protect critical infrastructure from potential attacks.