CVE-2026-103401

Full vulnerability record from the local CVENow database.

Description

An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints. This vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected.

Severity

HIGH

CVSS score

8.8 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-10-28 17:17:24.070000

Last modified

2026-10-28 17:17:24.337000

View original CVE JSON

{
  "id": "CVE-2026-103401",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-28T17:17:24.070",
  "lastModified": "2026-10-28T17:17:24.337",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Improper Link Resolution Before File Access ('Link Following') vulnerability in the unauthenticated web server handlers in Juniper Networks Session Smart Router and Session Smart Conductor allows a local unprivileged user to overwrite arbitrary files as root via unauthenticated API endpoints.\n\nThis vulnerability can be exploited on Mist-managed routers and on unmanaged Routers that have not yet been onboarded to a Conductor. Routers already managed by Conductor are not affected."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Juniper Networks",
          "product": "Session Smart Router",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "7.0.5",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "7.1.0",
              "lessThan": "7.1.7",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "7.2.0",
              "lessThan": "7.2.3",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Juniper Networks",
          "product": "Session Smart Conductor",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "lessThan": "7.0.5",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "7.1.0",
              "lessThan": "7.1.7",
              "versionType": "custom",
              "status": "affected"
            },
            {
              "version": "7.2.0",
              "lessThan": "7.2.3",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://supportportal.juniper.net/JSA112183",
      "source": "[email protected]"
    }
  ]
}