FKIE_CVE-2026-5269

Vulnerability from fkie_nvd - Published: 2026-07-14 23:17 - Updated: 2026-07-15 15:16
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In Ciena's Navigator Network Control Suite (NCS) and Manage Control Plan (MCP), there are hidden system accounts used for internal software operations. Some of these accounts have default passwords that may be predictable. While these accounts have very limited permissions on their own, an attacker could combine an attack using one of these accounts with other potential weaknesses to launch a more significant attack, possibly leading to escalation of privilege on the system.
References
7bd90cf1-1651-495e-9ae8-9415fb3c9febhttps://www.ciena.com/product-security
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Navigator NCS",
          "vendor": "CIENA",
          "versions": [
            {
              "status": "affected",
              "version": "8.1"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "MCP",
          "vendor": "CIENA",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 8.0"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Planner Plus OnPrem",
          "vendor": "CIENA",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c= 4.1"
            }
          ]
        }
      ],
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Ciena\u0027s Navigator Network Control Suite (NCS) and Manage Control Plan (MCP), there are hidden system accounts used for internal software operations. Some of these accounts have default passwords that may be predictable. While these accounts have very limited permissions on their own, an attacker could combine an attack using one of these accounts with other potential weaknesses to launch a more significant attack, possibly leading to escalation of privilege on the system."
    }
  ],
  "id": "CVE-2026-5269",
  "lastModified": "2026-07-15T15:16:46.743",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5269",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-15T14:30:47.245049Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-14T23:17:34.453",
  "references": [
    {
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
      "url": "https://www.ciena.com/product-security"
    }
  ],
  "sourceIdentifier": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1393"
        }
      ],
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
      "type": "Secondary"
    }
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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