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CVE-2018-8649

Status: ModifiedMedium (5.5)—
Severity5.5Medium · CVSS 3.0
Exploitation probability1.67 %higher than 76% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

A denial of service vulnerability exists when Windows improperly handles objects in memory, aka "Windows Denial of Service Vulnerability." This affects Windows 10, Windows Server 2019.

CVSS

Base score
5.5
Version
3.0
Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.67 %
Percentile among all scored CVEs
76
Score date
10/20/2026

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 (2)

Microsoft — Windows 10Microsoft — Windows Server 2019

CWEs

References

Show 4 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-8649",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.9,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 6.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Windows 10",
          "versions": [
            {
              "status": "affected",
              "version": "Version 1809 for 32-bit Systems"
            },
            {
              "status": "affected",
              "version": "Version 1809 for ARM64-based Systems"
            },
            {
              "status": "affected",
              "version": "Version 1809 for x64-based Systems"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2019",
          "versions": [
            {
              "status": "affected",
              "version": "(Server Core installation)"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-12-12T00:29:01.967",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/106091",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8649",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "http://www.securityfocus.com/bid/106091",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8649",
      "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 denial of service vulnerability exists when Windows improperly handles objects in memory, aka \"Windows Denial of Service Vulnerability.\" This affects Windows 10, Windows Server 2019."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de denegación de servicio (DoS) cuando Windows gestiona incorrectamente objetos en la memoria. Esto también se conoce como \"Windows Denial of Service Vulnerability\". Esto afecta a Windows 10 y Windows Server 2019."
    }
  ],
  "lastModified": "2026-06-17T02:05:15.427",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6B8F3DD2-A145-4AF1-8545-CC42892DA3D1"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DB79EE26-FC32-417D-A49C-A1A63165A968"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}