CVE-2026-80156Critical· 9.1▾ Midnight

Lantronix SLC8000 before firmware v9.7.0.5, 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 path traversal vulnerability in the web management port…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score50/ 100 · Moderate

impact 50.1 · likelihood 0.2 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

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Published

Sep 22, 2026

Updated

Sep 24, 2026

CVSS

9.1

Vendor

LANTRONIX

Product

SLC8000

CWE

CWE-22

Depth score

50 · Moderate

EPSS

1.0% · p62

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

decided 2026-09-23

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Sep 23.

1.0% → 1.0%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 2 days

Sep 22, 2026Published
Disclosed via NVD
Sep 23, 2026EPSS first tracked
1.0%
Sep 24, 2026Record revised
Last analysed / modified upstream

LANTRONIX CWE-22 #nvd #cve.org

Affected

SLC8000 < 9.7.0.5
EMG8500 < 9.7.0.1
EMG7500 < 9.7.0.1
SLB882
SLCx-03
SLCx-02

Full technical detail▾

Overview

Lantronix SLC8000 before firmware v9.7.0.5, 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 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; by supplying a filename containing both characters an attacker writes outside the intended upload directory to any writable path. Attackers can use this vulnerability to achieve complete loss of confidentiality, integrity, and availability on the affected device and potentially impact downstream serial-connected devices.

Remediation

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

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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