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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.

PUBLISHED Reserved 2026-06-14 | Published 2026-06-15 | Updated 2026-06-15 | Assigner VulDB




HIGH: 8.6CVSS: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
HIGH: 8.0CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
HIGH: 8.0CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
7.7AV:A/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

Stack-based Buffer Overflow

Memory Corruption

Product status

108.86.0.118
affected

Timeline

2026-06-14:Advisory disclosed
2026-06-14:VulDB entry created
2026-06-14:VulDB entry last update

Credits

ChiChen241 (VulDB User) reporter

VulDB CNA Team coordinator

References

vuldb.com/vuln/370865 (VDB-370865 | Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow) vdb-entry technical-description

vuldb.com/vuln/370865/cti (VDB-370865 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/cve/CVE-2026-12222 (CVE-2026-12222 | CVE Analysis and Report) third-party-advisory

vuldb.com/submit/834602 (Submit #834602 | yealink T46U 108.86.0.118 Stack-based Buffer Overflow) third-party-advisory

cdn2.v50to.cc/.../T46U_mod_webd_BlueToothTest_off_by_one.zip broken-link exploit

cve.org (CVE-2026-12222)

nvd.nist.gov (CVE-2026-12222)

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