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CVE-2025-26842

Estado: AnalizadaAlta (7.5)—

An issue was discovered in Znuny through 7.1.3. If access to a ticket is not given, the content of S/MIME encrypted e-mail messages is visible to users with access to the CommunicationLog.

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.

Vulnerabilidad remota (AV:N, PR:N, UI:N) en Znuny que expone contenido cifrado S/MIME sin autenticación adecuada. CWE-863 (autorización incorrecta) permite lectura de datos sensibles en logs, combinado con bypass de controles de acceso a tickets.

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

Vulnerability ScanningUser TrainingRestrict File and Directory PermissionsPrivileged Account ManagementPassword PoliciesNetwork Segmentation

Tecnologías afectadas (1)

Znuny — Znuny

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2025-26842",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2025-26842",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-05-08T18:53:25.929998Z"
        }
      }
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2025-05-08T16:15:25.263",
  "references": [
    {
      "url": "https://www.znuny.org/en/advisories/zsa-2025-01",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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    },
    {
      "lang": "es",
      "value": "Se detectó un problema en Znuny hasta la versión 7.1.3. Si no se permite el acceso a un ticket, el contenido de los mensajes de correo electrónico cifrados con S/MIME es visible para los usuarios con acceso al registro de comunicaciones."
    }
  ],
  "lastModified": "2026-06-17T09:02:28.187",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "versionEndIncluding": "7.1.3"
            }
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          "operator": "OR"
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  "sourceIdentifier": "cve@mitre.org"
}