Vulnerability · Published Sep 22, 2026 · Assigned by VulnCheck

CVE-2026-80146Lantronix Autonomous Out-of-Band Devices Stack-Based Buffer Overflow via mfc eeprom read

Critical 9.9

In plain English

A critical-severity stack buffer overflow in EMG7500 from LANTRONIX. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.8%top 41.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
LANTRONIX	SLC8000	0 – before 9.7.0.2
LANTRONIX	EMG8500	0 – before 9.7.0.1
LANTRONIX	EMG7500	0 – before 9.7.0.1
LANTRONIX	SLB882	*
LANTRONIX	SLCx-03	*
LANTRONIX	SLCx-02	*
LANTRONIX	SLC9000	0 – before 9.7.0.2

Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Researcher Disclosure technical-description
SLC8000 Firmware patch
EMG8500 Firmware patch
EMG7500 Firmware patch
SLC9000 Firmware patch
https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-stack-based-buffer-overflow-via-mfc-eeprom-read third-party-advisory