{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-5267",
        "assignerOrgId": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
        "state": "PUBLISHED",
        "assignerShortName": "Ciena",
        "dateReserved": "2026-03-31T19:44:26.584Z",
        "datePublished": "2026-09-25T19:10:46.330Z",
        "dateUpdated": "2026-09-25T20:40:31.039Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
                "shortName": "Ciena",
                "dateUpdated": "2026-09-25T19:10:46.330Z"
            },
            "title": "Unauthenticated Event Stream Exposure of Session Tokens in Navigator NCS",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-306",
                            "description": "CWE-306 Missing authentication for critical function",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Ciena",
                    "product": "Navigator NCS",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "7.2 and any older release"
                        },
                        {
                            "status": "affected",
                            "version": "7.2-P01 through 7.2-P07"
                        },
                        {
                            "status": "affected",
                            "version": "8.0"
                        },
                        {
                            "status": "affected",
                            "version": "8.0-P01 through 8.0-P06A"
                        },
                        {
                            "status": "affected",
                            "version": "8.1"
                        },
                        {
                            "status": "affected",
                            "version": "8.1-P01 through 8.1-P06"
                        },
                        {
                            "status": "affected",
                            "version": "8.2"
                        },
                        {
                            "status": "affected",
                            "version": "8.2-P01 through 8.2-P06"
                        },
                        {
                            "status": "affected",
                            "version": "9.0"
                        },
                        {
                            "status": "affected",
                            "version": "9.0-P01 through 9.0-P05A"
                        },
                        {
                            "status": "affected",
                            "version": "9.1"
                        },
                        {
                            "status": "affected",
                            "version": "9.1-P01 through 9.1-P05"
                        },
                        {
                            "status": "affected",
                            "version": "9.2"
                        },
                        {
                            "status": "affected",
                            "version": "9.2-P01 through 9.2-P02"
                        },
                        {
                            "status": "affected",
                            "version": "10.0"
                        },
                        {
                            "status": "affected",
                            "version": "10.0-P01 through 10.0-P01B"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Ciena Navigator Network\nControl Suite (NCS) contains an information exposure vulnerability in an\nevent-streaming API that does not properly enforce authentication. An\nunauthenticated attacker with network access to the affected service could\naccess the event stream and potentially obtain sensitive information.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "<p>Ciena Navigator Network\nControl Suite (NCS) contains an information exposure vulnerability in an\nevent-streaming API that does not properly enforce authentication. An\nunauthenticated attacker with network access to the affected service could\naccess the event stream and potentially obtain sensitive information.</p>"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.ciena.com/product-security"
                }
            ],
            "x_generator": {
                "engine": "Vulnogram 1.0.1"
            },
            "solutions": [
                {
                    "lang": "en",
                    "value": "Ciena recommends upgrading to the latest available remediated release. For additional details, refer to myciena.com for current software versions, fixes, and security advisories.\n\nRemediation and Fixes: \n\n\n\n\n \n  \n  \n\n Products \n\n\n  \n  \n  \n\nRemediated Version\n\n\n  \n \n \n  \n  \n\nNavigator NCS\n\n\n  \n  \n  \n\n8.0-P06B and\n  later\n\n\n  \n\n8.1-P06A and\n  later\n\n\n  \n\n8.2-P07 and\n  later\n\n\n  \n\n9.0-P05B and\n  later\n\n\n  \n\n9.1-P05A and\n  later\n\n\n  \n\n9.2-P02A and\n  later\n\n\n  \n\n10.0-P01C and later",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Ciena recommends upgrading to the latest available remediated release. For additional details, refer to myciena.com for current software versions, fixes, and security advisories.<div><p><b>Remediation and Fixes: </b></p>\n\n<table>\n <tbody><tr>\n  <td>\n  <p><b>&nbsp;Products </b></p>\n  </td>\n  <td>\n  <p><b>Remediated Version</b></p>\n  </td>\n </tr>\n <tr>\n  <td>\n  <p>Navigator NCS</p>\n  </td>\n  <td>\n  <p>8.0-P06B and\n  later</p>\n  <p>8.1-P06A and\n  later</p>\n  <p>8.2-P07 and\n  later</p>\n  <p>9.0-P05B and\n  later</p>\n  <p>9.1-P05A and\n  later</p>\n  <p>9.2-P02A and\n  later</p>\n  <p>10.0-P01C and later</p>\n  </td>\n </tr>\n</tbody></table></div>"
                        }
                    ]
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Special thanks to Gev Manekshaw",
                    "type": "reporter"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 7.5,
                            "attackVector": "NETWORK",
                            "baseSeverity": "HIGH",
                            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "NONE",
                            "privilegesRequired": "NONE",
                            "confidentialityImpact": "HIGH"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-09-25T20:40:10.302755Z",
                                "id": "CVE-2026-5267",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-25T20:40:31.039Z"
                }
            }
        ]
    }
}