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CVE-2018-8133

Status: ModifiedHigh (7.5)—💥 Exploit

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0943, CVE-2018-8130, CVE-2018-8145, CVE-2018-8177.

CVSS

Exploitation probability (EPSS)

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).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (2)

Microsoft — ChakracoreMicrosoft — Edge

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2018-8133",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:H/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "HIGH",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 4.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
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    "cvssMetricV30": [
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        "type": "Primary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Microsoft Edge",
          "versions": [
            {
              "status": "affected",
              "version": "Windows 10 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1607 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1607 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1703 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1703 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1709 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1709 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1803 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Windows 10 Version 1803 for x64-based Systems"
            },
            {
              "status": "affected",
              "version": "Windows Server 2016"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "ChakraCore",
          "versions": [
            {
              "status": "affected",
              "version": "ChakraCore"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-05-09T19:29:01.747",
  "references": [
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      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1040844",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8133",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://www.exploit-db.com/exploits/44817/",
      "tags": [
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        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/103982",
      "tags": [
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        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1040844",
      "tags": [
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        "VDB Entry"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
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        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
        "Exploit",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-843"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka \"Chakra Scripting Engine Memory Corruption Vulnerability.\" This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-0943, CVE-2018-8130, CVE-2018-8145, CVE-2018-8177."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de ejecución remota de código que se manifiesta en la forma en la que el motor de scripting de Chakra gestiona los objetos en la memoria en Microsoft Edge. Esto también se conoce como \"Chakra Scripting Engine Memory Corruption Vulnerability\". Esto afecta a Microsoft Edge y ChakraCore. El ID de este CVE es diferente de CVE-2018-0943, CVE-2018-8130, CVE-2018-8145 y CVE-2018-8177."
    }
  ],
  "lastModified": "2026-06-17T02:04:19.557",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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            }
          ],
          "operator": "OR"
        }
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        {
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              "versionEndIncluding": "1.8.3"
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  ],
  "sourceIdentifier": "secure@microsoft.com"
}