CVE-2026-86149

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 weakness has been identified in Tenda CP3 27.5.57.101. This issue affects some unknown processing of the file Net/NetCheckPing.cpp. This manipulation of the argument interface_name/host causes os command injection. The attack can be initiated remotely.

CVSS Scores

EPSS Scores

Probability:
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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-2026-86149

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 Net/NetCheckPing.cpp file where the interface_name or host argument is manipulated, allowing remote attackers to execute arbitrary commands on the system.

Detection Guidance

Detecting this vulnerability requires checking for command injection attempts targeting Tenda CP3 devices. Monitor network traffic for unusual ICMP or ping-related commands sent to the device. Inspect logs for unexpected interface_name or host parameter values in HTTP requests to the device's web interface. Use network scanning tools like Nmap to identify vulnerable Tenda CP3 devices on your network.

Impact Analysis

An attacker could remotely execute malicious commands on your device, potentially gaining control over it. This could lead to unauthorized access, data theft, or disruption of services if the device is used in a network.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations may face legal penalties, fines, or reputational damage if exploited.

Mitigation Strategies

Immediately update the Tenda CP3 firmware to the latest version to patch the vulnerability. Disable remote access to the device if not required. Monitor network traffic for unusual activity involving command injection attempts.

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