CVE-2026-80146: Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read
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 read 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
Which devices can be remediated with a firmware update, and which remain affected regardless of version?
SLC8000 devices are affected before firmware 9.7.0.2, while EMG8500 and EMG7500 devices are affected before firmware 9.7.0.1. All firmware versions of SLB882, SLCx-03, and SLCx-02 are affected.
What access does an attacker need to exploit this issue?
An attacker must authenticate as any user to the device terminal or CLI interface. No elevated privilege is stated as necessary; the vulnerable command accepts oversized user input after authentication.
What systems could be affected beyond the Lantronix device itself?
Successful exploitation may allow arbitrary code execution and complete compromise of the affected device's confidentiality, integrity, and availability. The impact can also extend to downstream devices attached through serial connections.