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CVE-2026-52688

Estado: Pendiente de análisisAlta (7.5)—

RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

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 en validación DNSSEC (AV:N, PR:N, UI:N) permite bypass de wildcard mediante RRSIGs malformados. AV:N sin autenticación indica T1190. I:H permite manipulación DNS (T1557 man-in-the-middle). CWE-295 (validación de certificado) y manipulación de registros sugieren T1565.003 (manipulación

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

Network SegmentationLimit Access to Resource Over NetworkFilter Network TrafficVulnerability ScanningUser TrainingRestrict File and Directory Permissions

Tecnologías afectadas (1)

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

Dnssec — DnssecAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-52688",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-52688",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-07-23T13:55:51.192363Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@open-xchange.com",
        "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:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@open-xchange.com",
      "affectedData": [
        {
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "modules": [
            "DNSSEC validation"
          ],
          "product": "Recursor",
          "versions": [
            {
              "status": "affected",
              "version": "5.2.0",
              "lessThan": "5.2.12",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.3.0",
              "lessThan": "5.3.9",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.4.0",
              "lessThan": "5.4.4",
              "versionType": "semver"
            }
          ],
          "packageName": "pdns-recursor",
          "programFiles": [
            "validate.cc"
          ],
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-07-23T09:16:27.080",
  "references": [
    {
      "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html",
      "source": "security@open-xchange.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        },
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation"
    }
  ],
  "lastModified": "2026-07-23T15:48:25.133",
  "sourceIdentifier": "security@open-xchange.com"
}