Log in Start free

Vulnerability · Published Jun 15, 2026 · Assigned by VulDB

CVE-2026-12218Yealink SIP-T46U Web FastCGI Service beforewifitest StartReportInformation 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 detected in Yealink SIP-T46U 108.87.50.1. The affected element is the function StartReportInformation of the file /api/inner/beforewifitest of the component Web FastCGI Service. The manipulation of the argument port results in stack-based buffer overflow. Access to the local network is required for this attack. The exploit is now public and may be used. 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 108.87.50.1

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