CVE-2023-33378: Connectedio Connected Io

Critical severity, CVSS 9.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Connected IO v2.1.0 and prior has an argument injection vulnerability in its AT command message in its communication protocol, enabling attackers to execute arbitrary OS commands on devices.

Affected products

• Connectedio Connected Io: up to and including 2.1.0

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