A vulnerability classified as critical was found in Yealink SIP-T46U 108.87.50.1 . The affected element is the function StartReportInformation of the file /api/inner/beforewifitest of the component Web FastCGI Service . The manipulation of the argument port results in stack-based buffer overflow. This vulnerability is known as CVE-2026-12218 . Access to the local network is required for this attack. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but di