CVE-2018-8399
Status: ModifiedHigh (7)—
Severity7High · CVSS 3.0
Exploitation probability1.16 %higher than 67% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 10 Servers, Windows 10. This CVE ID is unique from CVE-2018-8404.
CVSS
- Base score
- 7
- Version
- 3.0
- Vector
- CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 1.16 %
- Percentile among all scored CVEs
- 67
- Score date
- 10/22/2026
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)
CWEs
- CWE-404
References
Show 6 references
- http://www.securityfocus.com/bid/104998
- http://www.securitytracker.com/id/1041466
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8399
- http://www.securityfocus.com/bid/104998
- http://www.securitytracker.com/id/1041466
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8399
Raw JSON (NVD)
Show
{
"id": "CVE-2018-8399",
"cveTags": [],
"metrics": {
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"accessVector": "LOCAL",
"vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
"authentication": "NONE",
"integrityImpact": "COMPLETE",
"accessComplexity": "MEDIUM",
"availabilityImpact": "COMPLETE",
"confidentialityImpact": "COMPLETE"
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"impactScore": 10,
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"integrityImpact": "HIGH",
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"affected": [
{
"source": "secure@microsoft.com",
"affectedData": [
{
"vendor": "Microsoft",
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"versions": [
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"published": "2018-08-15T17:29:09.190",
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"vulnStatus": "Modified",
"weaknesses": [
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"description": [
{
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],
"descriptions": [
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"lang": "en",
"value": "An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka \"Win32k Elevation of Privilege Vulnerability.\" This affects Windows 10 Servers, Windows 10. This CVE ID is unique from CVE-2018-8404."
},
{
"lang": "es",
"value": "Existe una vulnerabilidad de elevación de privilegios en Windows cuando el componente Win32k gestiona incorrectamente los objetos en la memoria. Esto también se conoce como \"Win32k Elevation of Privilege Vulnerability\". Esto afecta a Windows 10 Servers y Windows 10. El ID de este CVE es diferente de CVE-2018-8404."
}
],
"lastModified": "2026-06-17T02:04:46.753",
"configurations": [
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"sourceIdentifier": "secure@microsoft.com"
}