Is this vulnerability remotely exploitable, and how broad is the impact scope?

Yes. Because the issue resides in a network-accessible HTTP POST handler, a remote attacker who can reach the /tree/tree_server.php endpoint may exploit it. The impact scope can extend from the compromised application to the underlying host and, in some cases, to adjacent systems if the attacker can pivot.

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

The attacker typically only needs the ability to send crafted HTTP POST requests to the vulnerable endpoint. If the endpoint is exposed without authentication, no prior credentials are required; if it is behind a login, any account that can access the affected functionality may be sufficient.

What is the safest general fix pattern for this vulnerability?

The most robust fix is to remove direct shell command construction from request-handling code. Instead, use safe, parameterized APIs that treat user input strictly as data, enforce strict validation on any remaining parameters, and ensure that no user-controlled content is ever interpreted as part of a command line.

Severity:

HIGH RISK

(7.3)

OS Command Injection (CWE-78) in Vaelsys HTTP POST Request Handler (/tree/tree_server.php)

CVE-2026-2952

Published:

Feb 22, 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 Code Execution via OS Command Injection

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

OS Command Injection

CWE:

CWE-77;CWE-78

Impact:

Remote Code Execution via OS Command Injection

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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OS Command Injection (CWE-78) in Vaelsys HTTP POST Request Handler (/tree/tree_server.php)

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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