Yealink · Sip-T46U · CVE-2026-12222
**Name of the Vulnerable Software and Affected Versions**
Yealink SIP-T46U version 108.86.0.118
**Description**
A stack-based buffer overflow exists in the Web FastCGI Service component within the `mod webd.BlueToothTest()` function of the `/api/inner/bttest` endpoint. This issue occurs when manipulating the `btMac`, `pin`, or `reserved` arguments. Exploitation requires the attacker to be located within the local network.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.