A vulnerability identified as critical has been detected in Totolink A8000RU 7.1cu.643_b20200521 . The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface . This manipulation of the argument FileName causes os command injection. This vulnerability is tracked as CVE-2026-9457 . The attack is possible to be carried out remotely. Moreover, an exploit is present.