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CVE-2026-20240

Estado: AnalizadaMedia (6.5)—

In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories.

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).

Tecnologías afectadas (2)

Splunk — SplunkSplunk — Splunk Cloud Platform

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-20240",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2026-20240",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-20T17:47:29.920729Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "psirt@cisco.com",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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      "affectedData": [
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          "product": "Splunk Enterprise",
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          "product": "Splunk Cloud Platform",
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              "status": "affected",
              "version": "10.4.2603",
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            {
              "status": "affected",
              "version": "10.3.2512",
              "lessThan": "10.3.2512.9",
              "versionType": "custom"
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              "status": "affected",
              "version": "10.2.2510",
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              "versionType": "custom"
            },
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              "status": "affected",
              "version": "10.1.2507",
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              "versionType": "custom"
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              "lessThan": "9.3.2411.129",
              "versionType": "custom"
            }
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  ],
  "published": "2026-05-20T18:16:26.637",
  "references": [
    {
      "url": "https://advisory.splunk.com/advisories/SVD-2026-0504",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@cisco.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@cisco.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories."
    },
    {
      "lang": "es",
      "value": "En las versiones de Splunk Enterprise anteriores a 10.2.2, 10.0.5, 9.4.11 y 9.3.12, y en las versiones de Splunk Cloud Platform anteriores a 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13 y 9.3.2411.129, un usuario con privilegios bajos que no posee los roles de Splunk 'admin' o 'power' podría causar una Denegación de Servicio al explotar el script 'coldToFrozen.sh' en la aplicación 'splunk_archiver' para renombrar directorios críticos de Splunk, dejando la instancia inoperativa.\n\nLa Denegación de Servicio es posible debido a la falta de validación de entrada en el script 'coldToFrozen.sh', que acepta rutas de archivo arbitrarias y las renombra sin restringir las operaciones a directorios seguros."
    }
  ],
  "lastModified": "2026-07-23T12:10:00.110",
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  "sourceIdentifier": "psirt@cisco.com"
}