Cybercriminals seek vulnerabilities that provide a huge yield, no matter how old they are. A recent trend in IoT botnet malware is to add exploits for multiple vulnerabilities and scan the internet for victims. Thousands of routers online are vulnerable to dated security issues. Users are often late in applying firmware updates because there is generally no simple way to learn about new releases. At least 3,700 of the unpatched state of the devices have been infected with malware designed to mine for cryptocurrency. Researchers discovered over 6,000 ASUS routers that showed IP addresses without the need for authentication.”]
Source: https://www.bitdefender.com/blog/hotforsecurity/no-matter-old-vulnerability-hackers-will-exploit/