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Vulnerability · Published Jun 15, 2026 · Assigned by VulDB

CVE-2026-12222Yealink SIP-T46U Web FastCGI Service bttest mod_webd.BlueToothTest stack-based overflow

High 8.0

In plain English

A high-severity stack buffer overflow in SIP-T46U from Yealink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)8.0High
Exploit odds (30 days)0.4%top 68.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Yealink SIP-T46U 108.86.0.118

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:C

References