A vulnerability classified as critical has been found in Totolink A8000RU 7.1cu.643_b20200521 . This issue affects the function setMacFilterRules of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface . This manipulation of the argument enable causes os command injection. This vulnerability appears as CVE-2026-9433 . The attack may be initiated remotely. In addition, an exploit is available.