An improper restriction of excessive authentication attempts vulnerability [CWE-307] in FortiTester Telnet port 2.3.0 through 3.9.1, 4.0.0 through 4.2.0, 7.0.0 through 7.1.0 may allow an unauthenticated attacker to guess the credentials of an admin user via a brute force attack.

An improper neutralization of special elements used in an OS Command ('OS Command Injection') vulnerabilities [CWE-78] in Telnet login components of FortiTester 2.3.0 through 3.9.1, 4.0.0 through 4.2.0, 7.0.0 through 7.1.0 may allow an unauthenticated remote attacker to execute arbitrary command in the underlying shell.

An improper neutralization of special elements used in an OS Command ('OS Command Injection') vulnerabilities [CWE-78] in Console login components of FortiTester 2.3.0 through 3.9.1, 4.0.0 through 4.2.0, 7.0.0 through 7.1.0 may allow an unauthenticated attacker to execute arbitrary command in the underlying shell.

An improper neutralization of special elements used in an OS Command ('OS Command Injection') vulnerabilities [CWE-78] in SSH login components of FortiTester 2.3.0 through 3.9.1, 4.0.0 through 4.2.0, 7.0.0 through 7.1.0 may allow an unauthenticated remote attacker to execute arbitrary command in the underlying shell.