Is this vulnerability remotely exploitable over the internet?

It can be, if the router's management interface is exposed beyond the local network or if an attacker can reach it via VPN or other remote access. In many home setups, the risk is higher from local network attackers or malware already inside the LAN.

Does exploitation require authentication to the router's admin interface?

That depends on the specific device configuration and any additional weaknesses present. In a secure configuration, an attacker would generally need valid administrative access or to bypass authentication through another flaw or misconfiguration.

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

Remove direct shell command construction from user inputs. Instead, use dedicated system APIs or libraries to update routing tables, and strictly validate all parameters (e.g., ensuring `destip` and `gateway` are valid IPs, `netmask` matches allowed formats, and `metric` is a bounded integer).

Severity:

HIGH RISK

(7.2)

OS Command Injection (CWE-78) in D-Link DIR-823X Static Route Configuration Handler

CVE-2026-2157

Published:

Feb 8, 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-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:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Command Execution on Router

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Command Execution on Router

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

OS Command Injection (CWE-78) in D-Link DIR-823X Static Route Configuration Handler

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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