CVE-2018-8621
Status: ModifiedMedium (5.5)—
An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory, aka "Windows Kernel Information Disclosure Vulnerability." This affects Windows Server 2012, Windows 7, Windows Server 2008 R2. This CVE ID is unique from CVE-2018-8477, CVE-2018-8622.
CVSS
- Version: 3.0
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Base score: 5.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 1.84%
- Percentile among all scored CVEs: 78
- Score date: 10/9/2026
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 (3)
CWEs
- NVD-CWE-noinfo
References
Raw JSON (NVD)
Show
{
"id": "CVE-2018-8621",
"cveTags": [],
"metrics": {
"cvssMetricV2": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"version": "2.0",
"baseScore": 2.1,
"accessVector": "LOCAL",
"vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
"authentication": "NONE",
"integrityImpact": "NONE",
"accessComplexity": "LOW",
"availabilityImpact": "NONE",
"confidentialityImpact": "PARTIAL"
},
"acInsufInfo": false,
"impactScore": 2.9,
"baseSeverity": "LOW",
"obtainAllPrivilege": false,
"exploitabilityScore": 3.9,
"obtainUserPrivilege": false,
"obtainOtherPrivilege": false,
"userInteractionRequired": false
}
],
"cvssMetricV30": [
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
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"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "NONE",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
"product": "Windows Server 2012",
"versions": [
{
"status": "affected",
"version": "(Server Core installation)"
}
]
},
{
"vendor": "Microsoft",
"product": "Windows 7",
"versions": [
{
"status": "affected",
"version": "32-bit Systems Service Pack 1"
},
{
"status": "affected",
"version": "x64-based Systems Service Pack 1"
}
]
},
{
"vendor": "Microsoft",
"product": "Windows Server 2008 R2",
"versions": [
{
"status": "affected",
"version": "Itanium-Based Systems Service Pack 1"
},
{
"status": "affected",
"version": "x64-based Systems Service Pack 1"
},
{
"status": "affected",
"version": "x64-based Systems Service Pack 1 (Server Core installation)"
}
]
}
]
}
],
"published": "2018-12-12T00:29:01.183",
"references": [
{
"url": "http://www.securityfocus.com/bid/106085",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8621",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "secure@microsoft.com"
},
{
"url": "http://www.securityfocus.com/bid/106085",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8621",
"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": "An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory, aka \"Windows Kernel Information Disclosure Vulnerability.\" This affects Windows Server 2012, Windows 7, Windows Server 2008 R2. This CVE ID is unique from CVE-2018-8477, CVE-2018-8622."
},
{
"lang": "es",
"value": "Existe una vulnerabilidad de divulgación de información cuando el kernel de Windows gestiona incorrectamente los objetos en la memoria. Esto también se conoce como \"Windows Kernel Information Disclosure Vulnerability\". Esto afecta a Windows Server 2012, Windows 7 y Windows Server 2008 R2. El ID de este CVE es diferente de CVE-2018-8477 y CVE-2018-8622."
}
],
"lastModified": "2026-06-17T02:05:12.553",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "C2B1C231-DE19-4B8F-A4AA-5B3A65276E46"
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*",
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"matchCriteriaId": "B320A104-9037-487E-BC9A-62B4A6B49FD0"
},
{
"criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*",
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"matchCriteriaId": "AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F"
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{
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"matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "secure@microsoft.com"
}