Vulnerability-Lookup

GHSA-M6C7-7XHP-6VHC

Vulnerability from github – Published: 2026-07-06 18:31 – Updated: 2026-07-06 21:30

Details

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.

Severity

9.1 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-5268"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-288"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-06T16:16:38Z",
    "severity": "CRITICAL"
  },
  "details": "An authentication bypass vulnerability exists in\nthe default SFTP server component utilized across the Ciena products listed. This vulnerability allows a remote, unauthenticated attacker to bypass\nsecurity controls and gain unauthorized access to the underlying filesystem.\nSuccessful exploitation could allow an attacker to read or modify system files.",
  "id": "GHSA-m6c7-7xhp-6vhc",
  "modified": "2026-07-06T21:30:37Z",
  "published": "2026-07-06T18:31:14Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5268"
    },
    {
      "type": "WEB",
      "url": "https://www.ciena.com/product-security"
    }
  ],
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  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-5268 (GCVE-0-2026-5268)

Vulnerability from cvelistv5 – Published: 2026-07-06 15:25 – Updated: 2026-07-08 20:18

Title

SFTP Server Authentication Weakness

Summary

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-288 - Authentication bypass using an alternate path or channel

Assigner

Ciena

References

1 reference

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

Impacted products

4 products

Vendor	Product	Version
CIENA	6500 S-Series	Affected: R16.96 and prior
CIENA	6500 T-Series	Affected: R16.1 and prior
CIENA	PTS	Affected: R16.1 and prior
CIENA	CPL	Affected: R12.63 and prior

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              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-06T18:42:35.509616Z",
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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.

Action not permitted

GHSA-M6C7-7XHP-6VHC

CVE-2026-5268 (GCVE-0-2026-5268)

Tags

Sightings

Nomenclature