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CVE-2026-33356

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CVE-2026-33356

Published: May 11, 2026

Modified: May 11, 2026

PUBLISHED

CVSS v3.1

7.7

HIGH

Description

In Meari IoT Cloud MQTT Broker deployments running EMQX 4.x, any authenticated low-privilege account can subscribe to global wildcard topics and receive telemetry from devices the user does not own. The broker enforces publish restrictions but does not enforce equivalent subscribe authorization at per-device scope.

VendorProductVersions

Meari

IoT Cloud MQTT Broker EMQX

affected
4.x

Weaknesses (CWE)

CWE-639

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

References

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