HIGHCVSS 7.8Actively exploited · CISA KEV since 2025-03-03Vulnerability

CVE-2018-8639

Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode.

Properties

Euvd product
Windows Server 2008, Windows 10, Windows 10 Servers, Windows RT 8.1, Windows 8.1, Windows Server 2016, Windows Server 2012 R2, Windows Server 2008 R2, Windows 7, Windows Server 2012, Windows Server 2019
Vulnerability name
Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
First seen
2025-10-21T23:45:46+00:00
Cvss score
7.8
Epss score
0.22179
Last seen
2026-10-19T12:00:27+00:00
Due date
2025-03-24
Euvd assigner
microsoft
Retrieved at
2026-10-21T01:24:47+00:00
Exploited euvd since
2025-03-03T00:00:00+00:00
Src batch id
epss_history-20261020T103617Z-728ddd
Source url
https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
Date added
2025-03-03
Score
7.8
Euvd base score version
3.1
Fetched at
2026-10-20T10:36:20+00:00
Euvd vendor
Microsoft
Cvss vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
In Signal since
initial import (Sep 2026)
Euvd base score
8.4

Related Entities (20)

AFFECTS_PRODUCT (17)

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

DESCRIBES (1)

←[KEVEntry]Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability

HAS_WEAKNESS (1)

→[Weakness]Improper Resource Shutdown or Release

INVOLVES (1)

←[Signal]kev_added · 2025-03-03

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