CVE-2026-33356 — Meari MQTT broker missing per-device subscribe ACL
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 t…
Published: 2026-05-11 · CVSS: 7.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7