CVE-2026-80146: Lantronix SLC/EMG/SLB series stack buffer overflow in EEPROM command

CVE-2026-80146 · Severity: critical · CVSS 9.9 · Published 2026-09-22

Lantronix out-of-band management devices used in data centers, telecom networks, and government infrastructure contain a stack buffer overflow in an undocumented EEPROM read command. An authenticated attacker can supply oversized input to the CLI or terminal interface to trigger the overflow and execute arbitrary code, gaining complete control of the device and potentially compromising downstream serial-attached systems and credentials stored on the device.

Technologies: Lantronix EMG7500, Lantronix EMG8500, Lantronix SLB882, Lantronix SLC8000, Lantronix SLC9000, Lantronix SLCx-02, Lantronix SLCx-03. Vendors: Lantronix.

Quick answers

Is CVE-2026-80146 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-80146 being exploited in the wild.
How severe is CVE-2026-80146?
Critical severity, with a CVSS score of 9.9, published 22 September 2026.
Which products and versions are affected?
Lantronix EMG7500 before 9.7.0.1; Lantronix EMG8500 before 9.7.0.1; Lantronix SLB882 all versions; Lantronix SLC8000 before 9.7.0.2; and 3 more.
Is there a fix for CVE-2026-80146?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-80146 attacked?
It is attacked with local access or over the network, in a network appliance.
Am I affected by CVE-2026-80146?
Check whether you run Lantronix EMG7500, Lantronix EMG8500, Lantronix SLB882 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow exists in an undocumented mfc eeprom read command that copies unbounded user input into a bounded stack buffer before passing it to a system() call. The vulnerability requires authentication to the terminal or CLI interface but allows an authenticated attacker to supply oversized input to trigger the overflow and achieve arbitrary code execution. Patches are available for SLC8000 (v9.7.0.2), SLC9000 (v9.7.0.2), and EMG series (v9.7.0.1), but SLB882, SLCx-03, and SLCx-02 devices have no patches available.

Affected products

  • Lantronix SLC8000 before 9.7.0.2
  • Lantronix SLC9000 before 9.7.0.2
  • Lantronix EMG8500 before 9.7.0.1
  • Lantronix EMG7500 before 9.7.0.1
  • Lantronix SLB882 all versions
  • Lantronix SLCx-03 all versions
  • Lantronix SLCx-02 all versions

Timeline

  • 2026-09-21: disclosed: RE/VRb research disclosure
  • 2026-09-22: advisory: NVD publication

References

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