Is this vulnerability remotely exploitable?

Yes. As described, exploitation is possible remotely by sending crafted requests to the device's web interface, assuming the diagnostic endpoint is reachable over the network.

What level of access does an attacker need?

The attacker needs network access to the management/diagnostic HTTP interface. Whether authentication is needed depends on how the device is configured; if the endpoint is exposed without strong access control, even unauthenticated users on reachable networks may attempt exploitation.

What is the safest general fix pattern for developers?

The most robust pattern is to avoid shell command construction altogether. Use APIs that execute system utilities with parameterized argument arrays, and perform strict allowlist-based validation on parameters like `IpAddr` so they can only contain valid IP address or hostname formats.

Severity:

HIGH RISK

(8.8)

OS Command Injection (CWE-78) in Netcore Power 15AX Diagnostic Tool Interface

CVE-2026-4840

Published:

Mar 25, 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

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

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

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

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

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution on Network Appliance

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution on Network Appliance

Severity:

HIGH RISK

(8.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

OS Command Injection (CWE-78) in Netcore Power 15AX Diagnostic Tool 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

(7.3)

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

HIGH RISK

HIGH

(7.3)

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

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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