CVE-2025-26412

Undocumented Root Shell Access in SIMCom SIM7600G Modem

Published Jun 11, 2025 CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
The SIMCom SIM7600G modem supports an undocumented AT command, which allows an attacker to execute system commands with root permission on the modem. An attacker needs either physical access or remote shell access to a device that interacts directly with the modem via AT commands.

Remediation

Vendor Solution

The vendor was unresponsive to multiple communication attempts during over one year of responsible disclosure after submitting the technical details to them. It is unknown to SEC Consult whether a patch is available. Customers of SIMCom are urged to reach out to their contact person at SIMCom or distributors to demand a patch which removes the backdoor command.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-18087 The SIMCom SIM7600G modem supports an undocumented AT command, which allows an attacker to execute system commands with root permission on the modem. An attacker needs either physical access or remote shell access to a device that interacts directly with the modem via AT commands.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00025}

epss

{'score': 0.00028}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The SIMCom SIM7600G modem supports an undocumented AT command, which allows an attacker to execute system commands with root permission on the modem. An attacker needs either physical access or remote shell access to a device that interacts directly with the modem via AT commands.
Title Undocumented Root Shell Access in SIMCom SIM7600G Modem
Weaknesses CWE-912
References

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
SEC-VLab
Published
Updated
Jun 18, 2025, 4:08 AM
Reserved
Feb 10, 2025, 7:48 AM
Status
Deferred
Published
Jun 11, 2025, 9:15 AM
Modified
Jun 17, 2026, 9:01 AM