CVE-2026-12218
HighCVSS 8.0Exploitation Probability (EPSS)
Low risk29th percentile - higher than 29% of all known CVEs
Summary
A stack-based buffer overflow vulnerability was found in Yealink SIP-T46U version 108.87.50.1. It affects the StartReportInformation function in the /api/inner/beforewifitest file of the Web FastCGI service. Manipulating the port argument causes the overflow.
Risk Assessment
An attacker with local network access can exploit this vulnerability to execute code or crash the device. The public exploit increases the risk of attack.
Recommendation
Apply the vendor's patch as soon as it is released. Until then, restrict management interface access to trusted networks only.
Original NVD description (English source)
A vulnerability was detected 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. Access to the local network is required for this attack. The exploit is now public and may be used. The vendor was contacted early about this disclosure and is working on a patch to fix it.