peter bassill · operator
$ cve CVE-2018-8639 JSON

CVE-2018-8639 KEV

7.8
HIGH · CVSS 3.1 · EPSS 22.2% (pctl 98)

Patch first

On CISA KEV — known exploited in the wild, due 2025-03-24.

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.

Scoring

CVSS7.8 (HIGH, v3.1)
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS22.18% — more likely to be exploited than 98% of all CVEs
WeaknessCWE-404
On CISA KEVyes — remediate by 2025-03-24
Public exploitnone known
Published2018-12-12
Last modified2026-06-17

CISA KEV

NameMicrosoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
Added2025-03-03
Due2025-03-24
Vendor / productMicrosoft / Windows
Ransomware useknown

Affected (13)

VendorProduct
microsoftwindows 10 1507
microsoftwindows 10 1607
microsoftwindows 10 1703
microsoftwindows 10 1709
microsoftwindows 10 1803
microsoftwindows 10 1809
microsoftwindows 7
microsoftwindows 8.1
microsoftwindows rt 8.1
microsoftwindows server 2008
microsoftwindows server 2012
microsoftwindows server 2016
microsoftwindows server 2019

References

→ the Explorer  ·  watch your stack  ·  NVD