CVE-2026-12197 | Ruijie EG105G-P 2.340 JSON-RPC Diagnose Endpoint diagnose nslookup params.target command injection (EUVD-2026-36673)

A vulnerability was found in Ruijie EG105G-P 2.340. It has been rated as critical. The impacted element is the function nslookup of the file /cgi-bin/luci/api/diagnose of the component JSON-RPC Diagnose Endpoint. Performing a manipulation of the argument params.target results in command injection. This vulnerability is cataloged as CVE-2026-12197. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The vendor was contacted early about this disclosure but did not respond in any way.