Is this vulnerability remotely exploitable?

Yes. An attacker with network access to the router's web management interface can remotely trigger the vulnerable `setWebWlanIdx` endpoint. If the interface is exposed to the internet or reachable from compromised internal hosts, remote exploitation is feasible.

What level of access does an attacker need to exploit this issue?

The attacker needs the ability to send HTTP requests to `/cgi-bin/cstecgi.cgi`. Depending on configuration, they may also need valid credentials, but weak, default, or reused passwords can effectively reduce this requirement.

What is the safest general fix pattern for developers and vendors?

Remove any reliance on shell command construction using user input. Replace such logic with parameterized, non-shell system calls, enforce strict allowlists on management parameters, and ensure all OS-level operations are performed with minimal privileges.

Severity:

CRITICAL RISK

(9.8)

OS Command Injection (CWE-78) in Totolink N300RH Web Management Interface

CVE-2026-3301

Published:

Feb 27, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-78

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution on Network Router

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution on Network Router

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

OS Command Injection (CWE-78) in Totolink N300RH Web Management Interface

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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