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CRITICAL

CVE-2026-80156

CVSS v3

9.1

CRITICAL

EPSS Score

1.0 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

Lantronix SLC8000 before firmware v9.7.0.5, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a path traversal vulnerability in the web management portal upload endpoint that allows authenticated attackers to write arbitrary data to any location on the device's filesystem, leading to remote code execution. The upload filename validation strips backslash characters but does not subsequently check for forward slashes when a backslash is detected;

Technical details

CVSS v3 Vector
3.1
Published
2026-09-22
Last Modified
2026-09-23

Frequently asked questions

What is CVE-2026-80156?

Lantronix SLC8000 before firmware v9.7.0.5, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882/SLCx-03/SLCx-02 contain a path traversal vulnerability in the web management portal upload endpoint that allows authenticated attackers to write arbitrary data to any location on the device's filesystem, leading to remote code execution. The upload filename validation strips backslash characters but does not subsequently check for forward slashes when a backslash is detected;

Is CVE-2026-80156 actively exploited?

Active exploitation of CVE-2026-80156 has not been confirmed. The EPSS score is 1.0%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-80156?

CVE-2026-80156 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string 3.1.

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