CVE-2026-12222
Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow
- State
- Published
- Severity
- 8.6 High
- Published
- Jun 15, 2026
- Updated
- Jun 27, 2026
- Reserved
- Jun 14, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 8.0 High | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C | VulDB |
| 3.0 | 8.0 High | CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C | VulDB |
| 2.0 | 7.7 High | AV:A/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
SIP-T46UYealink |
|
References
- VDB-370865 | Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflowvdb-entrytechnical-description
- VDB-370865 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-12222 | CVE Analysis and Reportthird-party-advisory
- Submit #834602 | yealink T46U 108.86.0.118 Stack-based Buffer Overflowthird-party-advisory
- http://cdn2.v50to.cc/T46U/T46U_mod_webd_BlueToothTest_off_by_one.zipbroken-linkexploit
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