CVE-2023-29336 — Win32k Elevation of Privilege Vulnerability

Executive Summary

None

Overview

7.8

CVSS HIGH

Important

MS Severity

Exploited

MS Exploit Status

Exploitation Detected

MS Exploit Likelihood

Category Elevation of Privilege

Released May 9 2023

Last Updated May 9 2023

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.40919 — 0.98478 percentile

NVD CVSS 7.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

Low

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.8

EPSS Score

0.40919

probability of exploitation in the next 30 days

0.98478 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

6 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems	`5026382 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 for x64-based Systems	`5026382 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1607 for 32-bit Systems	`5026363 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1607 for x64-based Systems	`5026363 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5026408 (Monthly Rollup) 5026427 (Security Only) Important Elevation of Privilege 5025271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.22070 Yes 5026408 5026427 Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5026408 (Monthly Rollup) 5026427 (Security Only) Important Elevation of Privilege 5025271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.22070 Yes 5026408 5026427 Windows Server 2008 for x64-based Systems Service Pack 2 5026408 (Monthly Rollup) 5026427 (Security Only) Important Elevation of Privilege 5025271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.22070 Yes 5026408 5026427 Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5026408 (Monthly Rollup) 5026427 (Security Only) Important Elevation of Privilege 5025271 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.0.6003.22070 Yes 5026408 5026427 Windows Server 2008 R2 for x64-based Systems Service Pack 1 5026413 (Monthly Rollup) 5026426 (Security Only) Important Elevation of Privilege 5025279 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.26519 Yes 5026413 5026426 Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5026413 (Monthly Rollup) 5026426 (Security Only) Important Elevation of Privilege 5025279 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.1.7601.26519 Yes 5026413 5026426 Windows Server 2012 5026419 (Monthly Rollup) 5026411 (Security Only) Important Elevation of Privilege 5025287 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.24266 Yes None Windows Server 2012 (Server Core installation) 5026419 (Monthly Rollup) 5026411 (Security Only) Important Elevation of Privilege 5025287 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.2.9200.24266 Yes None Windows Server 2012 R2 5026415 (Monthly Rollup) 5026409 (Security Only) Important Elevation of Privilege 5025285 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20969 Yes None Windows Server 2012 R2 (Server Core installation) 5026415 (Monthly Rollup) 5026409 (Security Only) Important Elevation of Privilege 5025285 Base: 7.8 Temporal: 6.8 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 6.3.9600.20969 Yes None Windows Server 2016	`5026363 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2016 (Server Core installation)	`5026363 (Security Update)`	Important	Elevation of Privilege	Yes

Patches

2 patches

Article	Type	Restart
`5026382`	Security Update	Yes
`5026363`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Jan Vojtěšek, Milánek, and Luigino Camastra with Avast

References

MSRC Advisory MITRE NVD