HIGH CISA KEV

CVE-2018-8639

CVSS v3

7.8

HIGH

EPSS Score

31.9%

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

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.

CISA Known Exploited Vulnerability

Date Added
3/3/2025
Patch Due Date
3/24/2025
Ransomware Use
Known

Technical details

Published
12/12/2018

Frequently asked questions

What is CVE-2018-8639?

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.

Is CVE-2018-8639 actively exploited?

Yes. CVE-2018-8639 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 3/24/2025.

What is the CVSS score for CVE-2018-8639?

CVE-2018-8639 has a CVSS v3 base score of 7.8 (HIGH severity).

Is CVE-2018-8639 affecting your environment?

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