CVE-2026-86148

Received Received - Intake

Command Injection in Tenda CP3 Router Firmware

Publication date: 2026-09-05

Last updated on: 2026-09-05

Assigner: VulDB

Description

A security flaw has been discovered in Tenda CP3 27.5.57.101. This vulnerability affects the function SystemAsh of the file Apis/system.c of the component Kylin. The manipulation of the argument AlarmVoiceURL results in os command injection. It is possible to launch the attack remotely.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-05

Last Modified

2026-09-05

Generated

2026-09-06

AI Q&A

2026-09-06

EPSS Evaluated

N/A

NVD

CVE-2026-86148

Affected Vendors & Products

Vendor	Product	Version / Range
tenda	cp3	27.5.57.101

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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.
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability is an OS command injection flaw in Tenda CP3 version 27.5.57.101. It exists in the SystemAsh function of the file Apis/system.c within the Kylin component. The issue arises from improper handling of the AlarmVoiceURL argument, allowing attackers to inject and execute arbitrary operating system commands remotely.

Detection Guidance

Detecting this vulnerability requires checking for command injection attempts targeting the SystemAsh function in Tenda CP3 devices. Monitor network traffic for unusual outbound connections or commands containing AlarmVoiceURL with shell metacharacters like semicolons or pipes. Inspect device logs for suspicious system calls or unexpected process executions.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary commands on the affected device. This could lead to full system compromise, unauthorized access, data theft, or disruption of device functionality. Attackers might gain control over the device without needing physical access or user interaction.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected Tenda CP3 devices may face compliance violations, legal penalties, and reputational damage due to potential exposure of sensitive data.

Mitigation Strategies

Immediately isolate affected Tenda CP3 devices from the network to prevent remote exploitation. Disable or restrict access to the SystemAsh function if possible. Update the device firmware to the latest version if a patch is available. Monitor for signs of compromise and apply network-level protections to block malicious traffic.

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