Hardcoded credentials in the Telnet service in D-Link DIR-605L v2.13B01 and DIR-816L v2.06B01 allow attackers to remotely execute arbitrary commands via firmware analysis.
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.