CVE-2026-12218

HIGH

Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow

Title source: cna
STIX 2.1

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 but did not respond in any way.

References (5)

Core 5
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-370861 | Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation stack-based overflow
https://vuldb.com/vuln/370861
Signature, Permissions Required signature permissions-required
VDB-370861 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/370861/cti
Third Party Advisory third-party-advisory
CVE-2026-12218 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-12218
Third Party Advisory third-party-advisory
Submit #834193 | yealink T46U 108.87.50.1 stack
https://vuldb.com/submit/834193

Scores

CVSS v3 8.0
EPSS 0.0037
EPSS Percentile 28.7%
Attack Vector ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-119 CWE-121
Status published
Products (1)
Yealink/SIP-T46U 108.87.50.1
Published Jun 15, 2026
Tracked Since Jun 15, 2026