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CVE-2021-28634

Estado: ModificadaAlta (8.2)—

Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by an Improper Neutralization of Special Elements used in an OS Command. An authenticated attacker could leverage this vulnerability to achieve arbitrary code execution on the host machine in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

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)

Adobe — Acrobat DCAdobe — Acrobat Reader DC

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-28634",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 8.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@adobe.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.2,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 1.5
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@adobe.com",
      "affectedData": [
        {
          "vendor": "Adobe",
          "product": "Acrobat Reader",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2020.004.30005"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2017.011.30197"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2021.005.20054"
            },
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "None"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-08-20T19:15:09.080",
  "references": [
    {
      "url": "https://helpx.adobe.com/security/products/acrobat/apsb21-51.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "psirt@adobe.com"
    },
    {
      "url": "https://helpx.adobe.com/security/products/acrobat/apsb21-51.html",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@adobe.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Acrobat Reader DC versions 2021.005.20054 (and earlier), 2020.004.30005 (and earlier) and 2017.011.30197 (and earlier) are affected by an Improper Neutralization of Special Elements used in an OS Command. An authenticated attacker could leverage this vulnerability to achieve arbitrary code execution on the host machine in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
    },
    {
      "lang": "es",
      "value": "Acrobat Reader DC versiones 2021.005.20054 (y anteriores), 2020.004.30005 (y anteriores), y 2017.011.30197 (y anteriores), están afectadas por una Neutralización Inapropiada de Elementos Especiales usados en un comando del Sistema Operativo. Un atacante autenticado podría aprovechar esta vulnerabilidad para lograr una ejecución de código arbitrario en la máquina anfitriona en el contexto del usuario actual. Una explotación de este problema requiere una interacción del usuario, ya que la víctima debe abrir un archivo malicioso."
    }
  ],
  "lastModified": "2026-06-17T03:46:40.577",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4A62CC78-7097-4825-8B08-2212B11E1F18",
              "versionEndIncluding": "21.005.20054",
              "versionStartIncluding": "15.008.20082"
            },
            {
              "criteria": "cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:classic:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7FDBB717-4658-426A-A98A-DA88EC0515B5",
              "versionEndIncluding": "17.011.30197",
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              "versionEndIncluding": "20.004.30005",
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            },
            {
              "criteria": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1EC1FC1B-592F-4635-A71C-1DCFAD3063DC",
              "versionEndIncluding": "21.005.20054",
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            },
            {
              "criteria": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D92E01B2-E4D3-414F-8852-294499AE4226",
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            },
            {
              "criteria": "cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:classic:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B78681E4-7FA9-4D05-9A5B-1B19097B5C41",
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            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@adobe.com"
}