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CVE-2018-8158

Status: ModifiedHigh (7.8)—

A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory, aka "Microsoft Office Remote Code Execution Vulnerability." This affects Microsoft Office. This CVE ID is unique from CVE-2018-8157, CVE-2018-8161.

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 — Office

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2018-8158",
  "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": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-05-09T19:29:02.463",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/104049",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securitytracker.com/id/1040853",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8158",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/104049",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1040853",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8158",
      "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 Office software when the software fails to properly handle objects in memory, aka \"Microsoft Office Remote Code Execution Vulnerability.\" This affects Microsoft Office. This CVE ID is unique from CVE-2018-8157, CVE-2018-8161."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de ejecución remota de código en el software de Microsoft Office cuando no gestiona correctamente objetos en la memoria. Esto también se conoce como \"Microsoft Office Remote Code Execution Vulnerability\". Esto afecta a Microsoft Office. El ID de este CVE es diferente de CVE-2018-8157 y CVE-2018-8161."
    }
  ],
  "lastModified": "2026-06-17T02:04:22.167",
  "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: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"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}