Is this vulnerability remotely exploitable over the internet?

It can be, but only if the Signal K Server's HTTP interface is reachable from the internet or other untrusted networks. If the server is strictly confined to a secure, isolated network segment, the practical exposure is reduced but not eliminated, especially if that segment includes untrusted devices.

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

The attacker needs network connectivity to the API endpoint; no application-level authentication is required. Being on the same LAN, Wi‑Fi, or any routable network path to the server is generally sufficient to send the malicious PUT request.

What is the safest general fix pattern for this issue?

The general fix is to enforce authentication and authorization on all configuration-modifying endpoints and to treat navigation source priority changes as an administrative capability restricted to trusted, authenticated users. Centralizing access control logic (e.g., shared middleware) helps avoid accidentally leaving critical routes unprotected.

Severity:

HIGH RISK

(7.5)

Missing Authentication and Access Control (CWE-306/CWE-284) in Signal K Server Source Priority Configuration

CVE-2026-33951

Published:

Apr 2, 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:

Authentication and Authorization Misconfiguration

CWE:

CWE-284;CWE-306

Impact:

Unauthorized Configuration Manipulation of Navigation Data Sources

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and Authorization Misconfiguration

CWE:

CWE-284;CWE-306

Impact:

Unauthorized Configuration Manipulation of Navigation Data Sources

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Missing Authentication and Access Control (CWE-306/CWE-284) in Signal K Server Source Priority Configuration

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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