CVE-2026-80143
Received Received - Intake

Authenticated Command Injection in Lantronix SLC8000, EMG8500, EMG7500, SLB882, and SLC Series Firmware

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: VulnCheck

Description
Lantronix SLC8000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a command injection vulnerability that allows authenticated attackers to execute arbitrary shell commands as root by exploiting an undocumented mfc eeprom read command that passes unsanitized user input to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and inject malicious commands through the unsanitized parameter to achieve complete loss of confidentiality, integrity, and availability on the affected device and potentially impact downstream serial-attached devices.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-80143
EUVD
EUVD-2026-84506

Affected Vendors & Products

Showing 6 associated CPEs
Vendor Product Version / Range
lantronix emg7500 to 9.7.0.1 (exc)
lantronix slc8000 to 9.7.0.2 (exc)
lantronix emg8500 to 9.7.0.1 (exc)
lantronix slb882 *
lantronix slcx-03 *
lantronix slcx-02 *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability is a command injection flaw in Lantronix devices including SLC8000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02. It allows authenticated attackers to execute arbitrary shell commands as root via an undocumented mfc eeprom read command that passes unsanitized user input to a system() call. Attackers can authenticate to the terminal or CLI interface and inject malicious commands.

Detection Guidance

Detecting this vulnerability requires checking the firmware versions of Lantronix devices. For SLC8000, verify if firmware is below v9.7.0.2. For EMG8500/EMG7500, check if firmware is below v9.7.0.1. All versions of SLB882/SLCx-03/SLCx-02 are vulnerable. Use CLI commands like 'show version' or 'system info' on the device to check firmware.

Impact Analysis

This vulnerability can lead to complete loss of confidentiality, integrity, and availability on the affected device. It may also impact downstream serial-attached devices. Attackers with access can execute arbitrary commands as root, potentially gaining full control over the system.

Compliance Impact

This vulnerability allows authenticated attackers to execute arbitrary shell commands as root, leading to complete loss of confidentiality, integrity, and availability on affected devices. Such unauthorized access could result in unauthorized data access, modification, or deletion, which directly violates GDPR's data protection requirements and HIPAA's safeguards for protected health information.

Mitigation Strategies

Immediately update affected devices to the latest firmware versions: SLC8000 to v9.7.0.2, EMG8500/EMG7500 to v9.7.0.1. Disable unnecessary user accounts and enforce strong authentication. Restrict access to the CLI interface and monitor for suspicious command injection attempts.

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