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CVE-2018-8587

Status: ModifiedHigh (7.8)—💥 PoC

A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory, aka "Microsoft Outlook Remote Code Execution Vulnerability." This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook.

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.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (2)

Microsoft — OfficeMicrosoft — Office 365 Proplus

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-8587",
  "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
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/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",
          "product": "Microsoft Office",
          "versions": [
            {
              "status": "affected",
              "version": "2019 for 32-bit editions"
            },
            {
              "status": "affected",
              "version": "2019 for 64-bit editions"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Office",
          "versions": [
            {
              "status": "affected",
              "version": "365 ProPlus for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "365 ProPlus for 64-bit Systems"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Microsoft Outlook",
          "versions": [
            {
              "status": "affected",
              "version": "2010 Service Pack 2 (32-bit editions)"
            },
            {
              "status": "affected",
              "version": "2010 Service Pack 2 (64-bit editions)"
            },
            {
              "status": "affected",
              "version": "2013 RT Service Pack 1"
            },
            {
              "status": "affected",
              "version": "2013 Service Pack 1 (32-bit editions)"
            },
            {
              "status": "affected",
              "version": "2013 Service Pack 1 (64-bit editions)"
            },
            {
              "status": "affected",
              "version": "2016 (32-bit edition)"
            },
            {
              "status": "affected",
              "version": "2016 (64-bit edition)"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-12-12T00:29:00.607",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/106097",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8587",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/106097",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8587",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A remote code execution vulnerability exists in Microsoft Outlook software when it fails to properly handle objects in memory, aka \"Microsoft Outlook Remote Code Execution Vulnerability.\" This affects Office 365 ProPlus, Microsoft Office, Microsoft Outlook."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de ejecución remota de código en el software de Microsoft Outlook cuando no gestiona correctamente objetos en la memoria. Esto también se conoce como \"Microsoft Outlook Remote Code Execution Vulnerability\". Esto afecta a Office 365 ProPlus, Microsoft Office y Microsoft Outlook."
    }
  ],
  "lastModified": "2026-06-17T02:05:09.240",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "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": "120690A6-E0A1-4E36-A35A-C87109ECC064"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F7DDFFB8-2337-4DD7-8120-56CC8EF134B4"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E0B3B0BC-C7C6-4687-AD72-DCA29FF9AE3A"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FF177984-A906-43FA-BF60-298133FBBD6B"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:office_365_proplus:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CA035812-F35A-43F1-9A8D-EE02201AA10A"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}