CVE-2026-80144: Lantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom write

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-22 · updated 2026-09-24
Weakness: CWE-78

Description

Lantronix SLC8000/SLC9000 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 write 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.

Affected products

LANTRONIX EMG7500: before 9.7.0.1 — fixed in 9.7.0.1
LANTRONIX EMG8500: before 9.7.0.1 — fixed in 9.7.0.1
LANTRONIX SLB882: all versions
LANTRONIX SLC8000: before 9.7.0.2 — fixed in 9.7.0.2
LANTRONIX SLC9000: before 9.7.0.2 — fixed in 9.7.0.2
LANTRONIX SLCx-02: all versions
LANTRONIX SLCx-03: all versions

How to fix

Upgrade to a fixed version: LANTRONIX EMG7500 9.7.0.1; LANTRONIX EMG8500 9.7.0.1; LANTRONIX SLC8000 9.7.0.2; LANTRONIX SLC9000 9.7.0.2. Check the vendor advisory for mitigations.

References

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