Is this vulnerability remotely exploitable?

Yes. If the MyTube instance is reachable over the network, an attacker can register a passkey and authenticate to obtain admin access without any prior credentials.

Does exploitation require any existing account or authentication?

No. The issue arises because the passkey registration endpoints are exposed without authentication, and all passkey-authenticated sessions receive admin privileges by default.

What is the safest general fix pattern?

Enforce authentication before allowing passkey registration, and decouple authentication from authorization so that new credentials default to a non-admin role unless an existing admin deliberately elevates them.

Severity:

CRITICAL RISK

(9.8)

Improper Access Control (CWE-284) in MyTube Passkey Registration Grants Unauthenticated Admin Access

CVE-2026-33890

Published:

Mar 26, 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:

Improper Access Control

CWE:

CWE-284

Impact:

Authentication Bypass to Full Administrative Compromise

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Access Control

CWE:

CWE-284

Impact:

Authentication Bypass to Full Administrative Compromise

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Improper Access Control (CWE-284) in MyTube Passkey Registration Grants Unauthenticated Admin Access

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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