CVE-2026-80156 (GCVE-0-2026-80156)

Vulnerability from cvelistv5 – Published: 2026-09-22 15:23 – Updated: 2026-09-22 15:23
VLAI
Title
Lantronix Autonomous Out-of-Band Devices Arbitrary File Write via Upload Filename Validation Bypass
Summary
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; 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.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
Vendor Product Version CPE status
LANTRONIX SLC8000 Affected: 0 , < 9.7.0.5 (custom)
guessed Create a notification for this product.
LANTRONIX EMG8500 Affected: 0 , < 9.7.0.1 (custom)
guessed Create a notification for this product.
LANTRONIX EMG7500 Affected: 0 , < 9.7.0.1 (custom)
guessed Create a notification for this product.
LANTRONIX SLB882 Affected: * (custom)
guessed Create a notification for this product.
LANTRONIX SLCx-03 Affected: * (custom)
guessed Create a notification for this product.
LANTRONIX SLCx-02 Affected: * (custom)
guessed Create a notification for this product.
Date Public
2026-09-18 00:00
Credits
RE/VRb
Show details on NVD website
To clipboard 

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    "dateReserved": "2026-08-25T20:43:54.262Z",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

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