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CVE-2021-21042

Estado: ModificadaMedia (6.5)—💥 PoC

Acrobat Reader DC versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Read vulnerability that could lead to arbitrary disclosure of information in the memory stack. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. 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).

💥 Exploits públicos

Hay código de explotación o plantillas de detección públicos. No es lo mismo que explotación activa confirmada (KEV), pero aumenta el riesgo: parchee con prioridad.

⚠️ Las pruebas de concepto de GitHub no están verificadas: algunas son falsas o contienen malware. No las ejecute nunca fuera de un laboratorio aislado.

Tecnologías afectadas (4)

Adobe — AcrobatAdobe — Acrobat DCAdobe — Acrobat ReaderAdobe — Acrobat Reader DC

CWE

Referencias

JSON original (NVD)

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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "obtainAllPrivilege": false,
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  "published": "2021-02-11T20:15:15.590",
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      "tags": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "value": "CWE-125"
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      "lang": "en",
      "value": "Acrobat Reader DC versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by an Out-of-bounds Read vulnerability that could lead to arbitrary disclosure of information in the memory stack. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file."
    },
    {
      "lang": "es",
      "value": "Las versiones 2020.013.20074 (y anteriores), 2020.001.30018 (y anteriores) y 2017.011.30188 (y anteriores) de Acrobat Reader DC están afectadas por una vulnerabilidad de lectura fuera de los límites que podría conducir a la divulgación arbitraria de información en la pila de memoria. Un atacante podría aprovechar esta vulnerabilidad para eludir mitigaciones como ASLR. La explotación de este problema requiere la interacción del usuario, ya que la víctima debe abrir un archivo malicioso"
    }
  ],
  "lastModified": "2026-06-17T03:34:43.020",
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