CVE-2026-12218
Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation 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 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.
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-370861 | Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflowvdb-entrytechnical-description
- VDB-370861 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-12218 | CVE Analysis and Reportthird-party-advisory
- Submit #834193 | yealink T46U 108.87.50.1 stackthird-party-advisory
- http://cdn2.v50to.cc/T46U/T46U_beforewifitest_stack_overflow.zipbroken-linkexploit
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