A Command Injection issue in the traceroute feature on TP-Link TL-WR841N V13 (JP) with firmware versions prior to 201216 allows authenticated users to execute arbitrary code as root via shell metacharacters, a different vulnerability than CVE-2018-12577.
https://www.tp-link.com/us/security
https://www.tp-link.com/jp/support/download/tl-wr841n/v13/#Firmware