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TI-2023-11824 Aliases CVE-2023-26921GHSA-fcmf-jqfc-733w

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

Priority HIGH 82CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-78.

Summary

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

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02692 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:quectel:ag550qcn_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableQuectel
cpe:2.3:h:quectel:ag550qcn:-:*:*:*:*:*:*:*not specified by NVDRunning onQuectel
  • cpe:2.3:o:quectel:ag550qcn_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Quectel
  • cpe:2.3:h:quectel:ag550qcn:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Quectel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-26921
  2. 2026-10-03 Alias added: GHSA-fcmf-jqfc-733w

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences