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CVE-2026-5268

An authentication bypass vulnerability exists in the default SFTP server component utilized across the Ciena products listed. This vulnerability allows a remote, unauthenticated attacker to bypass security controls and gain unauthorized access to the underlying filesystem. Successful exploitation could allow an attacker to read or modify system files.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7b69f20377d27d25736867a4388a2b1e82aa6fee7c326adf4fbf1c8cc7fb4536
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"defaultStatus":"unaffected","product":"6500 S-Series","vendor":"CIENA","versions":[{"status":"affected","version":"R16.96 and prior"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/0

{"defaultStatus":"unaffected","product":"CPL","vendor":"CIENA","versions":[{"status":"affected","version":"R12.63 and prior"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/3

{"defaultStatus":"unaffected","product":"6500 T-Series","vendor":"CIENA","versions":[{"status":"affected","version":"R16.1 and prior"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/1

{"defaultStatus":"unaffected","product":"PTS","vendor":"CIENA","versions":[{"status":"affected","version":"R16.1 and prior"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/2

Affected products and versions

4 source assertions
{"defaultStatus":"unaffected","product":"6500 S-Series","vendor":"CIENA","versions":[{"status":"affected","version":"R16.96 and prior"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/0
{"defaultStatus":"unaffected","product":"CPL","vendor":"CIENA","versions":[{"status":"affected","version":"R12.63 and prior"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/3
{"defaultStatus":"unaffected","product":"6500 T-Series","vendor":"CIENA","versions":[{"status":"affected","version":"R16.1 and prior"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/1
{"defaultStatus":"unaffected","product":"PTS","vendor":"CIENA","versions":[{"status":"affected","version":"R16.1 and prior"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/affected/2

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"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:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-288","description":"CWE-288 Authentication bypass using an alternate path or channel","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"tags":["vendor-advisory"],"url":"https://www.ciena.com/product-security"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:a794b9bf025075efd97e9f76134f4e7f7086706d66c395e02c6cf14bb7fbd035 · sha256:5ab5b97c838c24a1… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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