CVE-2026-12222: Yealink SIP-t46u

High severity, CVSS 8.0. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability was determined in Yealink SIP-T46U 108.86.0.118. Affected is the function mod_webd.BlueToothTest of the file /api/inner/bttest of the component Web FastCGI Service. Executing a manipulation of the argument btMac/pin/reserved can lead to stack-based buffer overflow. The attack needs to be done within the local network. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure and is working on a patch to fix it.

Affected products

• Yealink SIP-t46u: version 108.86.0.118 only

Published 2026-06-15. Last modified 2026-07-24.