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Vulnerability record · CVE-2026-12222 · published 15 June 2026

CVE-2026-12222: Memory buffer overflow vulnerability

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.

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 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.

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_mod_webd_BlueToothTest_off_by_one.zip
https://vuldb.com/cve/CVE-2026-12222
https://vuldb.com/submit/834602
https://vuldb.com/vuln/370865
https://vuldb.com/vuln/370865/cti

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Source: NIST National Vulnerability Database (record CVE-2026-12222), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.