---
id: CVE-2026-80146
title: >-
  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 …
summary: >-
  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 …
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-121
vendor: LANTRONIX
product: SLC8000
affected:
  - SLC8000 < 9.7.0.2
  - EMG8500 < 9.7.0.1
  - EMG7500 < 9.7.0.1
  - SLB882
  - SLCx-03
  - SLCx-02
  - SLC9000 < 9.7.0.2
published: '2026-09-22'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:16:36.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-80146'
references:
  - url: 'https://revrb.net/2026/09/21/revrb-lantern.html'
    label: disclosure@vulncheck.com
  - url: 'https://ts.lantronix.com/ftp/SLC9000/9.7.0.2R1/'
    label: disclosure@vulncheck.com
  - url: 'https://ts.lantronix.com/ftp/emg/EMG_7500/9.7.0.1R2/'
    label: disclosure@vulncheck.com
  - url: 'https://ts.lantronix.com/ftp/emg/EMG_8500/9.7.0.1R2/'
    label: disclosure@vulncheck.com
  - url: 'https://ts.lantronix.com/ftp/slc8000/9.7.0.2R1/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-stack-based-buffer-overflow-via-mfc-eeprom-read
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-25T23:33:56.909340Z'
epss: 0.00848
epssPercentile: 0.56335
ingestedAt: '2026-09-22T16:06:00.496Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.