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Vulnerability record · CVE-2026-12218 · published 15 June 2026

CVE-2026-12218: Memory buffer overflow vulnerability

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.

7.3 CVSS 4.0 High EPSS 0.37% · top 71.6% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow Deferred
7.3CVSS 4.0 base score, v2 7.7
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
24 Jul 2026Last modified by NVD

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.

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
http://cdn2.v50to.cc/T46U/T46U_beforewifitest_stack_overflow.zip
https://vuldb.com/cve/CVE-2026-12218
https://vuldb.com/submit/834193
https://vuldb.com/vuln/370861
https://vuldb.com/vuln/370861/cti

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Source: NIST National Vulnerability Database (record CVE-2026-12218), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.