The issue is related to improper input validation, which may allow an attacker to insert and run arbitrary code on a computer where the affected product is used. This can lead to remote code execution vulnerabilities. Various components and modules within the ABB Panel Builder 800 are affected, including those related to ModBus, TCP/IP addresses, and user settings. The vulnerability can be exploited through stack-based or heap-based buffer overflows, as well as format string vulnerabilities.