« Volver al listado

CVE-2025-7635

Estado: AnalizadaAlta (8.7)—

Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE.

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.

Acceso a red adyacente sin autenticación a Telnet (AV:A, PR:N, UI:N) que otorga acceso root directo. T1210 por servicios remotos en red adyacente; T1078 (credenciales/cuentas válidas) por obtener acceso root autenticado; T1068 como impacto secundario por la escalada implícita a máximos privilegios.

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

Threat Intelligence ProgramPrivileged Account ManagementApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareApplication Developer Guidance

Tecnologías afectadas (1)

Calix — Calix Gigacenter ONT

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-7635",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-7635",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-09-10T13:42:42.694051Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/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": 2.5
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "help@fluidattacks.com",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 8.7,
          "Automatable": "NOT_DEFINED",
          "attackVector": "ADJACENT",
          "baseSeverity": "HIGH",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "help@fluidattacks.com",
      "affectedData": [
        {
          "vendor": "Calix",
          "modules": [
            "Quantenna SoC"
          ],
          "product": "GigaCenter ONT",
          "versions": [
            {
              "status": "affected",
              "version": "844E"
            },
            {
              "status": "affected",
              "version": "844G"
            },
            {
              "status": "affected",
              "version": "844GE"
            },
            {
              "status": "affected",
              "version": "854GE"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2025-09-09T20:15:50.673",
  "references": [
    {
      "url": "https://fluidattacks.com/advisories/sal",
      "tags": [
        "Exploit",
        "Mitigation",
        "Third Party Advisory"
      ],
      "source": "help@fluidattacks.com"
    },
    {
      "url": "https://revers3everything.com/calix-case-five-0-days-five-cves/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "help@fluidattacks.com"
    },
    {
      "url": "https://www.calix.com",
      "tags": [
        "Product"
      ],
      "source": "help@fluidattacks.com"
    },
    {
      "url": "https://fluidattacks.com/advisories/sal",
      "tags": [
        "Exploit",
        "Mitigation",
        "Third Party Advisory"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "help@fluidattacks.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE."
    }
  ],
  "lastModified": "2026-06-17T10:05:23.343",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:calix:calix_gigacenter_ont:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E285ED64-5A84-408D-82C0-2884BCFAB9D1"
            },
            {
              "criteria": "cpe:2.3:a:calix:calix_gigacenter_ont:844e:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FADBB0EC-3887-4479-BD00-0B5C889F762A"
            },
            {
              "criteria": "cpe:2.3:a:calix:calix_gigacenter_ont:844g:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "84BC001C-DA8C-4A29-B7F6-158FC235669F"
            },
            {
              "criteria": "cpe:2.3:a:calix:calix_gigacenter_ont:844ge:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B7C3D463-3D1F-4EB4-9E2B-EA828589CDBE"
            },
            {
              "criteria": "cpe:2.3:a:calix:calix_gigacenter_ont:854ge:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "68F177AF-338D-4637-BE70-103C2DD2DC5C"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "help@fluidattacks.com"
}