A vulnerability, which was classified as critical, has been found in TOTOLINK CP900 6.3c.566. This issue affects the function setTelnetCfg of the component Telnet Service. The manipulation of the argument telnet_enabled leads to command injection. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-273557 was assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.