CVE-2026-80146Network attack vector

Authenticated code execution via unbounded EEPROM input

Published Sep 22, 2026 · Updated Sep 22, 2026

Stack-based buffer overflow in Lantronix SLC, SLB, and EMG devices allows remote authenticated users to execute code through the CLI. The undocumented mfc eeprom read command copies unbounded user input into a bounded stack buffer before passing it to system(). Any terminal or CLI user can supply oversized input; successful exploitation grants code execution on the device and can affect serial-attached devices.

CVSS severity9.4
Critical
EPSS probability0.85%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Lantronix SLC, SLB, and EMG devices allows remote authenticated users to execute code through the CLI. The undocumented mfc eeprom read command copies unbounded user input into a bounded stack buffer before passing it to system(). Any terminal or CLI user can supply oversized input; successful exploitation grants code execution on the device and can affect serial-attached devices.

The record

CVE
CVE-2026-80146
Published
Sep 22, 2026
Updated
Sep 22, 2026
Vendor
Lantronix
Product
SLC 8000
Classifications
CWE-121, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <9.7.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Lantronix · SLC 8000version=0 <9.7.0.2
Lantronix · SLCx-03version=*
Lantronix · SLCx-02version=*
Lantronix · EMG 8500version=0 <9.7.0.1
Lantronix · SLB882version=*
Lantronix · EMG 7500version=0 <9.7.0.1

Published CVSS scores

9.9VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.4VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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