« Back to list

CVE-2012-2557

Status: ModifiedHigh (9.3)—

Use-after-free vulnerability in Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "cloneNode Use After Free Vulnerability."

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).

Affected technologies (1)

Microsoft — Internet Explorer

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2012-2557",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "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
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2012-09-21T21:55:01.480",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/55647",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id?1027555",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.us-cert.gov/cas/techalerts/TA12-255A.html",
      "tags": [
        "US Government Resource"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-063",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15745",
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/55647",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id?1027555",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.us-cert.gov/cas/techalerts/TA12-255A.html",
      "tags": [
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-063",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15745",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-399"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use-after-free vulnerability in Microsoft Internet Explorer 6 through 8 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka \"cloneNode Use After Free Vulnerability.\""
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de uso después de liberación en Microsoft Internet Explorer 6 a 8 permite a atacantes remotos ejecutar código de su elección a través de un sitio web diseñado para tal fin que provoca el acceso a un objeto eliminado. Se trata de un problema también conocido como \"Vulnerabilidad de uso después de liberación de cloneNode\"."
    }
  ],
  "lastModified": "2026-06-16T23:41:40.750",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "693D3C1C-E3E4-49DB-9A13-44ADDFF82507"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "189294DA-8520-437D-AB0D-4A4B976902A5"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D47247A3-7CD7-4D67-9D9B-A94A504DA1BE"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6:sp2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "59159262-BA89-46B9-B16F-0CC6A5502C58"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:6:sp3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B299FCA1-1B63-470B-8017-F2FA8A52643A"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1A33FA7F-BB2A-4C66-B608-72997A2BD1DB"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CCB0B5FB-3915-4C4D-93F6-CB7AF104A555"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:beta2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "54E35389-8C02-4CD2-900E-956CB2403969"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:beta3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EBF48E84-0721-482D-A492-F3E27E94C3C6"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:7:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EB774F49-D9AE-4C9E-8081-CB10D546C8FE"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A52E757F-9B41-43B4-9D67-3FEDACA71283"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:8:beta1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "06E95EE4-23D8-40F7-9DFF-6C835AB62AE7"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:8:beta2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C4AC575C-3505-460F-8BB5-3ADA1F149E8D"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:8:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5CD76045-F748-4E32-82AB-B67649B2D3AA"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C043EDDD-41BF-4718-BDCF-158BBBDB6360"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}