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Lantronix Autonomous Out-of-Band Devices Arbitrary File Write via Upload Filename Validation Bypass

Type: advisorySource: Official CVE List1 source record

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.

Announced Group revision 1
Original source ↗

CVE-2026-80156

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80156

SLC8000

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

EMG8500

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

EMG7500

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

SLB882

Source reference: /containers/cna/affected/3/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

SLCx-03

Source reference: /containers/cna/affected/4/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

SLCx-02

Source reference: /containers/cna/affected/5/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

SLC9000

Source reference: /containers/cna/affected/6/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "LANTRONIX",
    "product": "SLC8000",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "9.7.0.5",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "LANTRONIX",
    "product": "EMG8500",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "9.7.0.1",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "LANTRONIX",
    "product": "EMG7500",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "9.7.0.1",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "LANTRONIX",
    "product": "SLB882",
    "versions": [
      {
        "status": "affected",
        "version": "*",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "LANTRONIX",
    "product": "SLCx-03",
    "versions": [
      {
        "status": "affected",
        "version": "*",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  },
  {
    "vendor": "LANTRONIX",
    "product": "SLCx-02",
    "versions": [
      {
        "status": "affected",
        "version": "*",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  },
  {
    "vendor": "LANTRONIX",
    "product": "SLC9000",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "9.7.0.2",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-80156

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#1864 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement

Revision history

  1. CVE-2026-80156 · Revision 1Source updated