CVE-2018-8639 - Vulnerability Details

Description

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 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.

Published: 2018-12-12

Score: 8.4 High

EPSS: 34.9% Moderate

KEV: Yes

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Microsoft

Windows 7

affected

Version	Status	Constraints
`32-bit Systems Service Pack 1`	affected	—
`x64-based Systems Service Pack 1`	affected	—

Microsoft

Windows Server 2012 R2

affected

Version	Status	Constraints
`(Server Core installation)`	affected	—

Microsoft

Windows RT 8.1

affected

Version	Status	Constraints
`Windows RT 8.1`	affected	—

Microsoft

Windows Server 2008

affected

Version	Status	Constraints
`32-bit Systems Service Pack 2`	affected	—
`32-bit Systems Service Pack 2 (Server Core installation)`	affected	—
`Itanium-Based Systems Service Pack 2`	affected	—
`x64-based Systems Service Pack 2`	affected	—
`x64-based Systems Service Pack 2 (Server Core installation)`	affected	—

Microsoft

Windows Server 2019

affected

Version	Status	Constraints
`(Server Core installation)`	affected	—

Microsoft

Windows Server 2012

affected

Version	Status	Constraints
`(Server Core installation)`	affected	—

Microsoft

Windows 8.1

affected

Version	Status	Constraints
`32-bit systems`	affected	—
`x64-based systems`	affected	—

Microsoft

Windows Server 2016

affected

Version	Status	Constraints
`(Server Core installation)`	affected	—

Microsoft

Windows Server 2008 R2

affected

Version	Status	Constraints
`Itanium-Based Systems Service Pack 1`	affected	—
`x64-based Systems Service Pack 1`	affected	—
`x64-based Systems Service Pack 1 (Server Core installation)`	affected	—

Microsoft

Windows 10

affected

Version	Status	Constraints
`32-bit Systems`	affected	—
`Version 1607 for 32-bit Systems`	affected	—
`Version 1607 for x64-based Systems`	affected	—
`Version 1703 for 32-bit Systems`	affected	—
`Version 1703 for x64-based Systems`	affected	—
`Version 1709 for 32-bit Systems`	affected	—
`Version 1709 for ARM64-based Systems`	affected	—
`Version 1709 for x64-based Systems`	affected	—
`Version 1803 for 32-bit Systems`	affected	—
`Version 1803 for ARM64-based Systems`	affected	—
`Version 1803 for x64-based Systems`	affected	—
`Version 1809 for 32-bit Systems`	affected	—
`Version 1809 for ARM64-based Systems`	affected	—
`Version 1809 for x64-based Systems`	affected	—
`x64-based Systems`	affected	—

Microsoft

Windows 10 Servers

affected

Version	Status	Constraints
`version 1709 (Server Core Installation)`	affected	—
`version 1803 (Server Core Installation)`	affected	—

Configuration 1 [-]

OR	cpe:2.3:o:microsoft:windows_10_1507:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1607:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1703:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1709:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1803:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1809:-:::::::*
	cpe:2.3:o:microsoft:windows_7:-:sp1::::::
	cpe:2.3:o:microsoft:windows_8.1:-::::pro_n:::
	cpe:2.3:o:microsoft:windows_rt_8.1:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2008:-:sp2::::::
	cpe:2.3:o:microsoft:windows_server_2008:r2::::::itanium:
	cpe:2.3:o:microsoft:windows_server_2008:r2::::::x64:
	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1::::::
	cpe:2.3:o:microsoft:windows_server_2012:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
	cpe:2.3:o:microsoft:windows_server_2016:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2019:-:::::::*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is in the KEV database since March 3, 2025.

The EPSS score is 0.34867.

Exploitation active

Automatable no

Technical Impact total

References

Link	Providers
http://www.securityfocus.com/bid/106093
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8639

History

Wed, 22 Oct 2025 00:15:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8639

Tue, 21 Oct 2025 20:30:00 +0000

Type	Values Removed	Values Added
References	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8639

Tue, 21 Oct 2025 19:30:00 +0000

Type	Values Removed	Values Added
References		https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-8639

Mon, 09 Jun 2025 21:15:00 +0000

Type	Values Removed	Values Added
CPEs	cpe:2.3:o:microsoft:windows_server_2016:1709:::::::* cpe:2.3:o:microsoft:windows_server_2016:1803:::::::*	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1::::::

Fri, 06 Jun 2025 18:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Microsoft windows 10 1507 Microsoft windows 10 1607 Microsoft windows 10 1703 Microsoft windows 10 1709 Microsoft windows 10 1803 Microsoft windows 10 1809
CPEs	cpe:2.3:o:microsoft:windows_10:-:::::::* cpe:2.3:o:microsoft:windows_10:1607:::::::* cpe:2.3:o:microsoft:windows_10:1703:::::::* cpe:2.3:o:microsoft:windows_10:1709:::::::* cpe:2.3:o:microsoft:windows_10:1803:::::::* cpe:2.3:o:microsoft:windows_10:1809:::::::*	cpe:2.3:o:microsoft:windows_10_1507:-:::::::* cpe:2.3:o:microsoft:windows_10_1607:-:::::::* cpe:2.3:o:microsoft:windows_10_1703:-:::::::* cpe:2.3:o:microsoft:windows_10_1709:-:::::::* cpe:2.3:o:microsoft:windows_10_1803:-:::::::* cpe:2.3:o:microsoft:windows_10_1809:-:::::::*
Vendors & Products	Microsoft windows 10	Microsoft windows 10 1507 Microsoft windows 10 1607 Microsoft windows 10 1703 Microsoft windows 10 1709 Microsoft windows 10 1803 Microsoft windows 10 1809
Metrics	cvssV3_0 `{'score': 7.8, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Fri, 06 Jun 2025 18:15:00 +0000

Type	Values Removed	Values Added
Metrics	cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`	cvssV3_1 `{'score': 8.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`

Tue, 04 Mar 2025 03:45:00 +0000

Type	Values Removed	Values Added
Metrics		kev `{'dateAdded': '2025-03-03'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 03 Mar 2025 16:45:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}`

Subscriptions

Microsoft Windows 10 1507 Windows 10 1607 Windows 10 1703 Windows 10 1709 Windows 10 1803 Windows 10 1809 Windows 7 Windows 8.1 Windows Rt 8.1 Windows Server 2008 Windows Server 2012 Windows Server 2016 Windows Server 2019

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2018-12-12T00:00:00.000Z

Updated: 2025-10-21T23:45:46.009Z

Reserved: 2018-03-14T00:00:00.000Z

Link: CVE-2018-8639

Vulnrichment

Updated: 2024-08-05T07:02:25.901Z

NVD

Status : Analyzed

Published: 2018-12-12T00:29:01.840

Modified: 2025-10-29T14:46:26.330

Link: CVE-2018-8639

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-404

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

Exploitation active

Automatable no

Technical Impact total

Subscriptions

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