An issue in Nepstech Wifi Router xpon (terminal) NTPL-Xpon1GFEVN, hardware verstion 1.0 firmware 2.0.1 allows a remote attacker to execute arbitrary code via the router's Telnet port 2345 without requiring authentication credentials.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.