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CVE-2026-13623

Estado: Pendiente de análisisMedia (4.8)—

An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Theme API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to read or write limited 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.

XSS en Theme API (CWE-79) de Synology DSM permite a administradores inyectar scripts maliciosos en páginas web (T1189). El atacante puede ejecutar comandos o leer archivos limitados aprovechando la sesión autenticada con privilegios elevados.

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

Restrict Web-Based ContentUser TrainingExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or ProgramApplication Isolation and Sandboxing

Tecnologías afectadas (1)

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

Synology — Diskstation ManagerAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-13623",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-13623",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-18T11:25:43.969447Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@synology.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 4.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 1.7
      }
    ]
  },
  "affected": [
    {
      "source": "security@synology.com",
      "affectedData": [
        {
          "vendor": "Synology",
          "product": "DiskStation Manager (DSM)",
          "versions": [
            {
              "status": "affected",
              "version": "7.4",
              "lessThan": "7.4-90075",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.3.2",
              "lessThan": "7.3.2-86009-4",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.2.2",
              "lessThan": "7.2.2-72806-9",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.2.1",
              "lessThan": "7.2.1-69057-12",
              "versionType": "semver"
            },
            {
              "status": "unknown",
              "version": "0",
              "lessThan": "7.2.1",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-18T09:16:38.500",
  "references": [
    {
      "url": "https://www.synology.com/en-global/security/advisory/Synology_SA_26_13",
      "source": "security@synology.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@synology.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Theme API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to read or write limited files."
    }
  ],
  "lastModified": "2026-09-18T19:07:38.320",
  "sourceIdentifier": "security@synology.com"
}