CVE-2026-80147: Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom write
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 stack-based buffer overflow vulnerability that allows authenticated attackers to potentially execute arbitrary code by exploiting an undocumented mfc eeprom write command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. Attackers can authenticate as any user to the terminal or CLI interface and supply an oversized input to trigger the overflow, potentially achieving complete loss of confidentiality, integrity, and availability on the affected device and impacting downstream serial-attached devices.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Lantronix SLC8000to a version that resolves this vulnerability.Fixed in 9.7.0.2 - Upgrade
Upgrade
Lantronix EMG8500/EMG7500to a version that resolves this vulnerability.Fixed in 9.7.0.1
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be able to authenticate to the affected device's terminal or CLI interface. Any authenticated user account may be sufficient; elevated privileges are not stated as required.
Which devices have a firmware update available?
SLC8000 devices are affected before firmware 9.7.0.2, while EMG8500 and EMG7500 devices are affected before firmware 9.7.0.1. The provided data states that all firmware versions of SLB882, SLCx-03, and SLCx-02 are affected.
What is the impact if exploitation succeeds?
Successful exploitation may allow arbitrary code execution on the device, resulting in complete compromise of confidentiality, integrity, and availability. Downstream devices attached over serial connections may also be impacted.
What can be done if firmware updates cannot be applied immediately?
Restrict terminal and CLI access to trusted authenticated users, since exploitation requires authentication through those interfaces. The provided information does not identify a configuration setting that disables the undocumented command.