Is this vulnerability remotely exploitable?

Yes. If the affected endpoint is exposed to the internet or any untrusted network, a remote attacker can exploit it by sending unauthenticated requests.

Does an attacker need a valid user account to exploit this?

No. The core problem is that the endpoint does not enforce authentication, so even completely unaffiliated clients can retrieve user account information.

What is the safest general fix pattern?

Introduce mandatory authentication and authorization on the endpoint, ensuring that only authenticated users can access account data, and that each user can only retrieve information they are explicitly allowed to see.

Severity:

CRITICAL RISK

(9.3)

Missing Authentication for Sensitive Endpoint (CWE-306) in Gardyn User Account API

CVE-2026-28766

Published:

Apr 3, 2026

Status:

Received

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:

Missing Authentication / Broken Access Control

CWE:

CWE-306

Impact:

Exposure of All User Account Information (Mass Data Disclosure)

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication / Broken Access Control

CWE:

CWE-306

Impact:

Exposure of All User Account Information (Mass Data Disclosure)

Severity:

CRITICAL RISK

(9.3)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Missing Authentication for Sensitive Endpoint (CWE-306) in Gardyn User Account API

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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