A vulnerability was found in Totolink X5000R 9.1.0cu.2300_B20230112. It has been rated as critical. This issue affects the function setDdnsCfg/setDynamicRoute/setFirewallType/setIPSecCfg/setIpPortFilterRules/setLancfg/setLoginPasswordCfg/setMacFilterRules/setMtknatCfg/setNetworkConfig/setPortForwardRules/setRemoteCfg/setSSServer/setScheduleCfg/setSmartQosCfg/setStaticDhcpRules/setStaticRoute/setVpnAccountCfg/setVpnPassCfg/setVpnUser/setWiFiAclAddConfig/setWiFiEasyGuestCfg/setWiFiGuestCfg/setWiFiRepeaterConfig/setWiFiScheduleCfg/setWizardCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to os command injection. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-247247. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.