« Back to list

CVE-2018-0802

Status: AnalyzedHigh (7.8)⚠ Active exploitation

Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability due to the way objects are handled in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE is unique from CVE-2018-0797 and CVE-2018-0812.

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).

CISA KEV — actively exploited

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Equation Editor en Office requiere interacción del usuario (UI:R) para ejecutar código remoto. Usado activamente por ransomware (T1059 → comandos; T1491.001 → cifrado de datos).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Application Isolation and SandboxingExploit ProtectionUpdate Software

Affected technologies (3)

Microsoft — OfficeMicrosoft — Office Compatibility PackMicrosoft — Word

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-0802",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2018-0802",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-02-07T16:28:56.157400Z"
        }
      }
    ],
    "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
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/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": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/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": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft Corporation",
          "product": "Equation Editor",
          "versions": [
            {
              "status": "affected",
              "version": "Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-01-10T01:29:00.820",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/102347",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1040153",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.html",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://github.com/rxwx/CVE-2018-0802",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://github.com/zldww2011/CVE-2018-0802_POC",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://research.checkpoint.com/another-office-equation-rce-vulnerability/",
      "tags": [
        "Exploit"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/102347",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1040153",
      "tags": [
        "Broken Link",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://0patch.blogspot.com/2018/01/the-bug-that-killed-equation-editor-how.html",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/rxwx/CVE-2018-0802",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/zldww2011/CVE-2018-0802_POC",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0802",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://research.checkpoint.com/another-office-equation-rce-vulnerability/",
      "tags": [
        "Exploit"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0802",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Equation Editor in Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013, and Microsoft Office 2016 allow a remote code execution vulnerability due to the way objects are handled in memory, aka \"Microsoft Office Memory Corruption Vulnerability\". This CVE is unique from CVE-2018-0797 and CVE-2018-0812."
    },
    {
      "lang": "es",
      "value": "Equation Editor en Microsoft Office 2007, Microsoft Office 2010, Microsoft Office 2013 y Microsoft Office 2016 permite una vulnerabilidad de ejecución remota de código debido a la forma en la que se gestionan los objetos en la memoria. Esto también se conoce como \"Microsoft Office Memory Corruption Vulnerability\". Este CVE es diferente de CVE-2018-0797 y CVE-2018-0812."
    }
  ],
  "lastModified": "2026-06-17T01:31:41.493",
  "cisaActionDue": "2022-05-03",
  "cisaExploitAdd": "2021-11-03",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:office:2007:sp3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FEECD12A-5BEF-4675-B62E-86CF4A7474D7"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2010:sp2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "081DE1E3-4622-4C32-8B9C-9AEC1CD20638"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2013:sp1:*:*:-:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "552E1557-D6FA-45DD-9B52-E13ACDBB8A62"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0B3B0BC-C7C6-4687-AD72-DCA29FF9AE3A"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2016:*:*:*:click-to-run:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E74CB3D6-B0D7-4A6C-ABAA-170C7710D856"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "71AF058A-2E5D-4B11-88DB-8903C64B13C1"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:word:2007:sp3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7D006508-BFB0-4F21-A361-3DA644F51D8A"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "24EEDAD9-9656-4B21-82E4-D60B83777492"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:word:2013:sp1:*:*:-:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D7A48E44-F01A-40AD-B8AF-8FE368248003"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "45E21528-4B0F-4A6F-82AD-DF7FDBF67C8F"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4DA042D4-B14E-4DDF-8423-DFB255679EFE"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Microsoft Office Memory Corruption Vulnerability"
}