CVE-2023-26921: Quectel AG550QCN Firmware

Critical severity, CVSS 9.8. EPSS: 2.7% chance of exploitation in the next 30 days.

OS Command Injection vulnerability in quectel AG550QCN allows attackers to execute arbitrary commands via ql_atfwd.

Affected products

• Quectel AG550QCN Firmware: affected versions not specified

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