CVE-2026-12222

HIGH

Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow

Title source: cna
STIX 2.1

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 but did not respond in any way.

References (5)

Core 5
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-370865 | Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow
https://vuldb.com/vuln/370865
Signature, Permissions Required signature permissions-required
VDB-370865 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/vuln/370865/cti
Third Party Advisory third-party-advisory
CVE-2026-12222 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-12222
Third Party Advisory third-party-advisory
Submit #834602 | yealink T46U 108.86.0.118 Stack-based Buffer Overflow
https://vuldb.com/submit/834602

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 108.86.0.118
Published Jun 15, 2026
Tracked Since Jun 15, 2026