Yealink SIP-T46U 108.86.0.118 Web FastCGI Service /api/inner/bttest mod_webd.BlueToothTest btMac/pin/reserved stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k2.09

Summaryinfo

A vulnerability was found in Yealink SIP-T46U 108.86.0.118. It has been classified as critical. Affected by this vulnerability is the function mod_webd.BlueToothTest of the file /api/inner/bttest of the component Web FastCGI Service. The manipulation of the argument btMac/pin/reserved leads to stack-based overflow. This vulnerability is referenced as CVE-2026-12222. The attack needs to be initiated within the local network. Furthermore, an exploit is available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Yealink SIP-T46U 108.86.0.118. This issue affects the function mod_webd.BlueToothTest of the file /api/inner/bttest of the component Web FastCGI Service. The manipulation of the argument btMac/pin/reserved with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

The advisory is shared at cdn2.v50to.cc. The identification of this vulnerability is CVE-2026-12222. The exploitation is known to be easy. Access to the local network is required for this attack. Technical details as well as a public exploit are known.

The exploit is available at cdn2.v50to.cc. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.0
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/14/2026 Advisory disclosed
06/14/2026 +0 days VulDB entry created
06/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: cdn2.v50to.cc
Status: Not defined

CVE: CVE-2026-12222 (🔒)
GCVE (CVE): GCVE-0-2026-12222
GCVE (VulDB): GCVE-100-370865
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/14/2026 15:59
Changes: 06/14/2026 15:59 (59)
Complete: 🔍
Submitter: ChiChen241
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #834602: yealink T46U 108.86.0.118 Stack-based Buffer Overflow (by ChiChen241)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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