CVE-2018-8589

At a glance

Severity: HIGH 7.8
Exploitation: Known exploited (CISA KEV) · added 2022-05-23
Exploited per ENISA since 2022-05-23
EPSS: EPSS 3.02 % · percentile 87 (2026-10-28)
State: PUBLISHED
Published: 2018-11-14
Updated: 2025-10-21
Assigner: microsoft
NVD status: Analyzed

Description

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka "Windows Win32k Elevation of Privilege Vulnerability." This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
CVSS 2.0	HIGH 7.2	AV:L/AC:L/Au:N/C:C/I:C/A:C	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2018-20204
GCVE · GCVE-0-2018-8589

CERT-FR advisories

CERTFR-2018-AVI-552 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*

Affected products

Product	Versions
Microsoft · Windows Server 2008	affected 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)
Microsoft · Windows 7	affected 32-bit Systems Service Pack 1 ; affected x64-based Systems Service Pack 1
Microsoft · Windows Server 2008 R2	affected Itanium-Based Systems Service Pack 1 ; affected x64-based Systems Service Pack 1 ; affected x64-based Systems Service Pack 1 (Server Core installation)

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
CISA Known Exploited Vulnerabilities	CC0 1.0
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD