Vulnerability-Lookup

GHSA-6JRJ-GPHG-P8MJ

Vulnerability from github – Published: 2026-07-15 00:31 – Updated: 2026-07-15 15:33

Details

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.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-5269"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1393"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-14T23:17:34Z",
    "severity": "CRITICAL"
  },
  "details": "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": "GHSA-6jrj-gphg-p8mj",
  "modified": "2026-07-15T15:33:00Z",
  "published": "2026-07-15T00:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5269"
    },
    {
      "type": "WEB",
      "url": "https://www.ciena.com/product-security"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-5269 (GCVE-0-2026-5269)

Vulnerability from cvelistv5 – Published: 2026-07-14 22:25 – Updated: 2026-07-15 14:30

Title

Navigator NCS and MCP System Accounts with Default Passwords

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 14:30 UTC

CWE

CWE-1393 - Use of default password

Assigner

Ciena mitre root

References

1 reference

URL	Tags
https://www.ciena.com/product-security

Impacted products

3 products

Vendor	Product	Version
CIENA	Navigator NCS	Affected: 8.1
CIENA	MCP	Affected: <= 8.0
CIENA	Planner Plus OnPrem	Affected: <= 4.1

Credits

Special thanks to the team at TDC NET for their contribution.

Show details on NVD website

JSON

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        "metrics": [
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            "cvssV3_1": {
              "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"
            }
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                "options": [
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                    "Exploitation": "none"
                  },
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-15T14:30:47.245049Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-07-15T14:30:50.769Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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      }
    ],
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      "affected": [
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          "product": "Navigator NCS",
          "vendor": "CIENA",
          "versions": [
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              "status": "affected",
              "version": "8.1"
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        },
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              "value": "\u003cp\u003eCiena recommends upgrading to the latest\navailable remediated release. For additional details, refer to myciena.com for\ncurrent software versions, fixes, and security advisories.\u003c/p\u003e\n\n\u003cp\u003e\u0026nbsp;\u003c/p\u003e\n\n\u003cp\u003e\u003cb\u003eRemediation\nand Fixes: \u003c/b\u003e\u003c/p\u003e\n\n\u003ctable\u003e\n \u003ctbody\u003e\u003ctr\u003e\n  \u003ctd\u003e\n  \u003cp\u003e\u003cb\u003e\u0026nbsp;Products \u003c/b\u003e\u003c/p\u003e\n  \u003c/td\u003e\n  \u003ctd\u003e\n  \u003cp\u003e\u003cb\u003eRemediated Version\u003c/b\u003e\u003c/p\u003e\n  \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n  \u003ctd\u003e\n  \u003cp\u003eNavigator NCS\u003c/p\u003e\n  \u003c/td\u003e\n  \u003ctd\u003e\n  \u003cp\u003e\u0026gt;= 8.2, 8.1-P02\u003c/p\u003e\n  \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n  \u003ctd\u003e\n  \u003cp\u003eMCP\u003c/p\u003e\n  \u003c/td\u003e\n  \u003ctd\u003e\n  \u003cp\u003e8.0-P04, 7.2-P07\u003c/p\u003e\n  \u003c/td\u003e\n \u003c/tr\u003e\n \u003ctr\u003e\n  \u003ctd\u003e\n  \u003cp\u003ePlanner Plus OnPrem\u003c/p\u003e\n  \u003c/td\u003e\n  \u003ctd\u003e\n  \u003cp\u003e\u0026gt;= 4.2, 4.1-P01\u003c/p\u003e\n  \u003c/td\u003e\n \u003c/tr\u003e\n\u003c/tbody\u003e\u003c/table\u003e"
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        }
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    "dateReserved": "2026-03-31T19:44:35.713Z",
    "dateUpdated": "2026-07-15T14:30:50.769Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-6JRJ-GPHG-P8MJ

CVE-2026-5269 (GCVE-0-2026-5269)

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