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CVE-2026-5268

Estado: Pendiente de análisisCrítica (9.1)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:N sin UI indica aplicación expuesta en red. CWE-288 es autenticación fallida. T1078 por acceso sin credenciales; T1005 y T1565.001 por lectura/modificación de archivos del sistema mencionada.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Ciena — Sftp ServerAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-5268",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-5268",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-06T18:42:35.509616Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
      "affectedData": [
        {
          "vendor": "CIENA",
          "product": "6500 S-Series",
          "versions": [
            {
              "status": "affected",
              "version": "R16.96 and prior"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "CIENA",
          "product": "6500 T-Series",
          "versions": [
            {
              "status": "affected",
              "version": "R16.1 and prior"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "CIENA",
          "product": "PTS",
          "versions": [
            {
              "status": "affected",
              "version": "R16.1 and prior"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "CIENA",
          "product": "CPL",
          "versions": [
            {
              "status": "affected",
              "version": "R12.63 and prior"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-07-06T16:16:38.433",
  "references": [
    {
      "url": "https://www.ciena.com/product-security",
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb",
      "description": [
        {
          "lang": "en",
          "value": "CWE-288"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "lastModified": "2026-07-08T21:16:54.663",
  "sourceIdentifier": "7bd90cf1-1651-495e-9ae8-9415fb3c9feb"
}