High severity · published Jun 15, 2026
CVE-2026-12222
Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow
8.0
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
SIP-T46U · Yealink
108.86.0.118 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12222
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-12222
cdn2.v50to.cc
http://cdn2.v50to.cc/T46U/T46U_mod_webd_BlueToothTest_off_by_one.zip
vuldb.com
https://vuldb.com/cve/CVE-2026-12222
vuldb.com
https://vuldb.com/submit/834602
vuldb.com
https://vuldb.com/vuln/370865
vuldb.com
https://vuldb.com/vuln/370865/cti
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