CVE-2026-33356

Meari MQTT broker missing per-device subscribe ACL

CVSS 7.7 HIGHEPSS 0.3%CWE-639

Vexday Risk Score

21Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 7.7EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

11 mai 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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.

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

Produtos afetados

Meari · IoT Cloud MQTT Broker EMQX

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Referências

https://github.com/xn0tsa/nobody-puts-baby-in-a-corner https://www.runzero.com/advisories/meari-mqtt-broker-missing-per-device-subscribe-acl-cve-2026-33356/