Despite all the investments in cyber defenses, businesses are vulnerable to human error and often unintended security gaps. A good firewall can produce a false sense of security. Even if you have a firewall, there are several devices that might be on a network that are access points to that network. Infosecurity Magazine tested next-generation firewall products from leading vendors and found that more than 80% missed evasions intended to bypass security measures. More than half of companies surveyed had experienced an IT security breach that included print security within the previous 12 months.”]
Source: https://www.csoonline.com/article/3229131/don-t-be-lulled-by-firewall-security.html