CVE-2026-12222

HIGH 8.0

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

CVSS Score

8.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121 CWE-119
Vendor	yealink
Product	sip-t46u
Published	Jun 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Yealink / SIP-T46U

108.86.0.118

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/370865 vuldb.com: https://vuldb.com/vuln/370865/cti vuldb.com: https://vuldb.com/cve/CVE-2026-12222 vuldb.com: https://vuldb.com/submit/834602 cdn2.v50to.cc: http://cdn2.v50to.cc/T46U/T46U_mod_webd_BlueToothTest_off_by_one.zip

Credits

🔍 ChiChen241 (VulDB User) VulDB CNA Team