A stack-buffer overflow vulnerability [CWE-121] in Fortinet FortiMail CLI version 7.6.0 through 7.6.1 and before 7.4.3 allows a privileged attacker to execute arbitrary code or commands via specifically crafted CLI commands.
Solution:
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).