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CVE-2021-26605

Estado: ModificadaCrítica (9.8)—

An improper input validation vulnerability in the service of ezPDFReader allows attacker to execute arbitrary command. This issue occurred when the ezPDF launcher received and executed crafted input values through JSON-RPC communication.

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 (1)

Unidocs — Ezpdfreader

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-26605",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "vuln@krcert.or.kr",
        "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
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
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    ]
  },
  "affected": [
    {
      "source": "vuln@krcert.or.kr",
      "affectedData": [
        {
          "vendor": "unidocs",
          "product": "ezPDFReader",
          "versions": [
            {
              "status": "affected",
              "version": "2.0 ~ 3.0"
            }
          ],
          "platforms": [
            "Windows"
          ]
        }
      ]
    }
  ],
  "published": "2021-08-05T21:15:11.820",
  "references": [
    {
      "url": "https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36168",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vuln@krcert.or.kr"
    },
    {
      "url": "https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36168",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "vuln@krcert.or.kr",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper input validation vulnerability in the service of ezPDFReader allows attacker to execute arbitrary command. This issue occurred when the ezPDF launcher received and executed crafted input values through JSON-RPC communication."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de comprobación inapropiada de entrada en el servicio de ezPDFReader, permite a un atacante ejecutar un comando arbitrario. Este problema ocurría cuando el lanzador de ezPDF recibía y ejecutaba valores de entrada diseñados mediante la comunicación JSON-RPC"
    }
  ],
  "lastModified": "2026-06-17T03:43:33.040",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:unidocs:ezpdfreader:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7365289A-2436-4604-9675-3C264840B154",
              "versionEndIncluding": "3.0",
              "versionStartIncluding": "2.0"
            }
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        },
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            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "vuln@krcert.or.kr"
}