Command Injection in Yealink SIP-T46U

Publication date: 2026-06-15

Last updated on: 2026-06-27

Assigner: VulDB

Description

A flaw has been found in Yealink SIP-T46U 108.86.0.118. The impacted element is the function mod_diagnose.CommandShellByType of the file /api/diagnosis/start of the component Web FastCGI Service. This manipulation of the argument Time causes command injection. The attack can be initiated remotely. The exploit has been published and may be used. Upgrading to version 108.87.0.23 is sufficient to resolve this issue. It is advisable to upgrade the affected component.

CVSS Scores

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Meta Information

Published

2026-06-15

Last Modified

2026-06-27

Generated

2026-07-05

AI Q&A

2026-06-15

EPSS Evaluated

2026-07-04

NVD

CVE-2026-12219

EUVD

EUVD-2026-36692

Affected Vendors & Products

Vendor	Product	Version / Range
yealink	sip-t46u	108.86.0.118

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-74	The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
CWE-77	The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability is a flaw found in the Yealink SIP-T46U device, specifically in the function mod_diagnose.CommandShellByType within the file /api/diagnosis/start of the Web FastCGI Service component. The issue arises from improper handling of the argument 'Time', which allows an attacker to perform command injection. This means an attacker can remotely execute arbitrary commands on the affected device.

Impact Analysis

The vulnerability allows remote attackers to inject and execute arbitrary commands on the affected Yealink SIP-T46U device. This can lead to unauthorized control over the device, potentially compromising its integrity, availability, and confidentiality. Since the exploit has been published, attackers may actively use it to gain access or disrupt services.

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