High severity7.7NVD Advisory· Published May 11, 2026· Updated May 13, 2026
CVE-2026-33356
CVE-2026-33356
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.
AI Insight
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Affected products
2Patches
Vulnerability mechanics
References
1News mentions
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