A vulnerability, which was classified as critical , has been found in Totolink A8000RU 7.1cu.643_b20200521 . This issue affects the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface . Performing a manipulation of the argument mac results in os command injection. This vulnerability is reported as CVE-2026-9477 . The attack is possible to be carried out remotely. Moreover, an exploit is present.