CVE-2023-26921

9.8 criticalEPSS 2.7%

Critical (9.8) in quectel ag550qcn firmware. 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.

Severity

9.8 critical

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

EPSS: 2.7% chance of exploitation in the next 30 days; higher than 85% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2023-04-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19