Is this vulnerability remotely exploitable over the internet?

It can be, depending on deployment. If the management interface is exposed to the internet through remote management features, port forwarding, or misconfigured firewalls, an external attacker could exploit the issue; otherwise, exploitation is typically limited to the local network.

Does an attacker need valid credentials to exploit this?

That depends on the access controls configured for the `adm.cgi` endpoint. If strong authentication protects the sysCMD functionality, attackers would need to obtain credentials or exploit weak/default ones; if access controls are lax or misconfigured, unauthenticated exploitation may be possible.

What is the safest general fix pattern for this type of bug?

The robust fix is to remove dynamic shell construction entirely and use APIs that execute predefined commands with validated, parameterized arguments, combined with strict allowlists and input validation so user input cannot influence the command structure.

Severity:

CRITICAL RISK

(9.8)

OS Command Injection (CWE-78) in WiFi Extender WDR201A Web Management Interface

CVE-2026-30703

Published:

Mar 18, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution on Network Device

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-78

Impact:

Remote Code Execution on Network Device

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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OS Command Injection (CWE-78) in WiFi Extender WDR201A 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

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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