by Kastro
Paper/Archive/CVE-2026-80143

CVE-2026-80143

LANTRONIX SLC8000 — Lantronix Autonomous Out-of-Band Devices CLI Command Injection via mfc eeprom read

EPSS 2%CVSS 9.9
critical.is priorityof 100
45
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 77.1.771 × 2015.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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 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.

Affected

ProductAffectedFixed inSource
SLC8000< 9.7.0.29.7.0.2CNA
EMG8500< 9.7.0.19.7.0.1CNA
EMG7500< 9.7.0.19.7.0.1CNA
SLB882all versions–CNA
SLCx-03all versions–CNA
SLCx-02all versions–CNA
SLC9000< 9.7.0.29.7.0.2CNA

Scores by source

VulnCheck (CNA)9.9CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

writeuprevrb.net/2026/09/21/revrb-lantern.htmlpatchts.lantronix.com/ftp/slc8000/9.7.0.2R1patchts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2patchts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2patchts.lantronix.com/ftp/SLC9000/9.7.0.2R1writeupvulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-cli-command-injection-via-mfc-eeprom-read