{"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\u00a0Products \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"}}]}}

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