CVE-2026-80146: Lantronix EMG7500

Critical severity, CVSS 9.9. EPSS: 0.8% chance of exploitation in the next 30 days.

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 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 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: any version
• 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: any version
• Lantronix Slcx-03: any version

Published 2026-09-22. Last modified 2026-09-26.