How broadly exploitable is this vulnerability?

The vulnerability can be exploited remotely by anyone who can reach the router's management interface and send crafted HTTP requests to the vulnerable CGI endpoint. If remote administration is exposed or default credentials remain in place, the practical exploit scope can extend to wide-area attacks.

Does an attacker need authenticated access to exploit this?

Exploitation often assumes the ability to hit the `setPptpServerCfg` handler with attacker-controlled parameters. In many deployments this may require valid credentials, but weak, default, or reused passwords—or additional flaws—can reduce or eliminate this barrier.

What is the safest general fix pattern for developers?

Replace shell-based configuration logic with direct API calls or system libraries that take parameters as typed arguments, and strictly validate each configuration field against expected formats and allowed value sets before use.

Severity:

CRITICAL RISK

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setPptpServerCfg

CVE-2026-6028

Published:

Apr 10, 2026

Status:

Received

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-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

Remote Code Execution on the Router

April 12, 2026

CWE-77;CWE-78

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Remote Code Execution on the Router

April 12, 2026

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution on Embedded Device

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 Embedded Device

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setPptpServerCfg

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

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI Handler setAccessDeviceCfg

CRITICAL RISK

CRITICAL

(9.8)

OS Command Injection (CWE-78) in Totolink A7100RU CGI setLedCfg Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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