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CVE-2018-9521

Status: ModifiedHigh (8.8)—
Severity8.8High · CVSS 3.0
Exploitation probability1.54 %higher than 75% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

In parseMPEGCCData of NuPlayer2CCDecoder.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android. Versions: Android-9. Android ID: A-111874331

CVSS

Base score
8.8
Version
3.0
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.54 %
Percentile among all scored CVEs
75
Score date
10/21/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Google — Android

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-9521",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 9.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
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      "source": "security@android.com",
      "affectedData": [
        {
          "vendor": "Google Inc.",
          "product": "Android",
          "versions": [
            {
              "status": "affected",
              "version": "Android-9"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-11-14T18:29:00.493",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/105865",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "security@android.com"
    },
    {
      "url": "https://source.android.com/security/bulletin/2018-11-01",
      "tags": [
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      "source": "security@android.com"
    },
    {
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      "tags": [
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        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://source.android.com/security/bulletin/2018-11-01",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In parseMPEGCCData of NuPlayer2CCDecoder.cpp, there is a possible out of bounds write due to an incorrect bounds check. This could lead to remote code execution in an unprivileged process with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android. Versions: Android-9. Android ID: A-111874331"
    },
    {
      "lang": "es",
      "value": "En parseMPEGCCData de NuPlayer2CCDecoder.cpp, hay una posible escritura fuera de límites debido a una comprobación de límites incorrecta. Esto podría llevar a una ejecución remota de código en un proceso no privilegiado sin necesitar privilegios de ejecución adicionales. No se necesita interacción del usuario para explotarlo. Producto: Android. Versiones: Android-9. Android ID: A-111874331"
    }
  ],
  "lastModified": "2026-06-17T02:06:51.213",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8DFAAD08-36DA-4C95-8200-C29FE5B6B854"
            }
          ],
          "operator": "OR"
        }
      ]
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  ],
  "sourceIdentifier": "security@android.com"
}