CVE-2023-33379: Connectedio ER2000T-Vz-CAT1 Firmware

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Connected IO v2.1.0 and prior has a misconfiguration in their MQTT broker used for management and device communication, which allows devices to connect to the broker and issue commands to other device, impersonating Connected IO management platform and sending commands to all of Connected IO's devices.

Affected products

• Connectedio ER2000T-Vz-CAT1 Firmware: up to and including 2.1.0

Published 2023-08-04. Last modified 2026-06-17.