Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed

{
  "id": "e964249a31c464f35792bc1d041049693e36a88c54085269143d54a5aef4bfa8",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-103409",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Session Smart Router: An attacker obtains administrative privileges when an unauthenticated internal endpoint is accessed",
    "summary": "A Missing authentication for critical function vulnerability in Juniper Networks Session Smart Router allows an unauthenticated network-based attacker to obtain administrative privileges by passing crafted URL parameters to an insecure endpoint running as root. Note that this vulnerability can only be exploited prior to the device being onboarded to Mist/Conductor. The issue can no longer be exploited once a device is onboarded to Mist/Conductor.",
    "evidence": "cve:CVE-2026-103409",
    "products": [
      {
        "name": {
          "value": "Session Smart Router",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-103409",
      "aliases": [
        "CVE-2026-103409"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 9.8,
            "attackVector": "NETWORK",
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "confidentialityImpact": "HIGH"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Juniper Networks",
          "product": "Session Smart Router",
          "versions": [
            {
              "status": "affected",
              "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"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-28T16:36:46.539Z",
      "provider": "cve",
      "references": [
        "https://supportportal.juniper.net/JSA112183"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
          "shortName": "juniper",
          "dateUpdated": "2026-10-28T16:36:46.539Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103409",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 461082,
  "published_at": "2026-10-28T16:36:46.539+00:00"
}