CVE-2018-8637
Status: ModifiedMedium (5.5)—
An information disclosure vulnerability exists in Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (KASLR) bypass, aka "Win32k Information Disclosure Vulnerability." This affects Windows 10 Servers, Windows 10, Windows Server 2019.
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: 1.85%
- Percentile among all scored CVEs: 79
- Score date: 10/18/2026
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-2018-8637",
"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": [
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"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 10 Servers",
"versions": [
{
"status": "affected",
"version": "version 1803 (Server Core Installation)"
}
]
},
{
"vendor": "Microsoft",
"product": "Windows 10",
"versions": [
{
"status": "affected",
"version": "Version 1803 for 32-bit Systems"
},
{
"status": "affected",
"version": "Version 1803 for ARM64-based Systems"
},
{
"status": "affected",
"version": "Version 1803 for x64-based Systems"
},
{
"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"
}
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},
{
"vendor": "Microsoft",
"product": "Windows Server 2019",
"versions": [
{
"status": "affected",
"version": "(Server Core installation)"
}
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}
],
"published": "2018-12-12T00:29:01.747",
"references": [
{
"url": "http://www.securityfocus.com/bid/106095",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "secure@microsoft.com"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8637",
"tags": [
"Patch",
"Vendor Advisory"
],
"source": "secure@microsoft.com"
},
{
"url": "http://www.securityfocus.com/bid/106095",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"source": "af854a3a-2127-422b-91ae-364da2661108"
},
{
"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8637",
"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 in Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (KASLR) bypass, aka \"Win32k Information Disclosure Vulnerability.\" This affects Windows 10 Servers, Windows 10, Windows Server 2019."
},
{
"lang": "es",
"value": "Existe una vulnerabilidad de divulgación de información en el kernel de Windows que podría permitir que un atacante recupere información, lo que podría conducir a una omisión de KASLR (Kernel Address Space Layout Randomization) del kernel. Esto también se conoce como como \"Win32 Information Disclosure Vulnerability\". Esto afecta a Windows 10 Servers, Windows 10 y Windows Server 2019."
}
],
"lastModified": "2026-06-17T02:05:14.183",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*",
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"matchCriteriaId": "7CB85C75-4D35-480E-843D-60579EC75FCB"
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{
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{
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{
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"matchCriteriaId": "DB79EE26-FC32-417D-A49C-A1A63165A968"
}
],
"operator": "OR"
}
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}
],
"sourceIdentifier": "secure@microsoft.com"
}