by Kastro
Paper/Archive/CVE-2026-80147

CVE-2026-80147

LANTRONIX SLC8000 — Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom write

EPSS 0.5%CVSS 9.9
critical.is priorityof 100
38
CVSS 9.9 (CNA)9.9 / 10 × 3029.7Not in CISA KEV+300.0EPSS percentile 40.2.402 × 208.0No 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 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

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-stack-based-buffer-overflow-via-mfc-eeprom-write