CVE-2023-29336

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.412 · 99 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 2 exploits · PoC

Likely / severe?

41.2% (99th) EPSS

CVSS 7.8 · high

Is it mine?

85 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2023-05-09remediate by 2023-05-30

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Microsoft Win32K Privilege Escalation Vulnerability

Win32k Elevation of Privilege Vulnerability

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedWindows 10 Version 1607 for 32-bit Systemsmsrc_csaf
10.0.14393.5921:Security Update:https://support.microsoft.com/help/5026363
https://support.microsoft.com/help/5026363
FixedWindows 10 Version 1607 for x64-based Systemsmsrc_csaf
10.0.14393.5921:Security Update:https://support.microsoft.com/help/5026363
https://support.microsoft.com/help/5026363
FixedWindows 10 for 32-bit Systemsmsrc_csaf
10.0.10240.19926:Security Update:https://support.microsoft.com/help/5026382
https://support.microsoft.com/help/5026382
FixedWindows 10 for x64-based Systemsmsrc_csaf
10.0.10240.19926:Security Update:https://support.microsoft.com/help/5026382
https://support.microsoft.com/help/5026382
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1msrc_csaf
6.1.7601.26519:Monthly Rollup:https://support.microsoft.com/help/5026413
https://support.microsoft.com/help/5026413
FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)msrc_csaf
6.1.7601.26519:Monthly Rollup:https://support.microsoft.com/help/5026413
https://support.microsoft.com/help/5026413
FixedWindows Server 2008 for 32-bit Systems Service Pack 2msrc_csaf
6.0.6003.22070:Monthly Rollup:https://support.microsoft.com/help/5026408
https://support.microsoft.com/help/5026408
FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.22070:Monthly Rollup:https://support.microsoft.com/help/5026408
https://support.microsoft.com/help/5026408
FixedWindows Server 2008 for x64-based Systems Service Pack 2msrc_csaf
6.0.6003.22070:Monthly Rollup:https://support.microsoft.com/help/5026408
https://support.microsoft.com/help/5026408
FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)msrc_csaf
6.0.6003.22070:Monthly Rollup:https://support.microsoft.com/help/5026408
https://support.microsoft.com/help/5026408
FixedWindows Server 2012msrc_csaf
6.2.9200.24266:Security Only:https://support.microsoft.com/help/5026411
https://support.microsoft.com/help/5026411
FixedWindows Server 2012 (Server Core installation)msrc_csaf
6.2.9200.24266:Security Only:https://support.microsoft.com/help/5026411
https://support.microsoft.com/help/5026411
FixedWindows Server 2012 R2msrc_csaf
6.3.9600.20969:Security Only:https://support.microsoft.com/help/5026409
https://support.microsoft.com/help/5026409
FixedWindows Server 2012 R2 (Server Core installation)msrc_csaf
6.3.9600.20969:Security Only:https://support.microsoft.com/help/5026409
https://support.microsoft.com/help/5026409
FixedWindows Server 2016msrc_csaf
10.0.14393.5921:Security Update:https://support.microsoft.com/help/5026363
https://support.microsoft.com/help/5026363
FixedWindows Server 2016 (Server Core installation)msrc_csaf
10.0.14393.5921:Security Update:https://support.microsoft.com/help/5026363
https://support.microsoft.com/help/5026363

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:Csecondary · Microsoft Security Response Center US

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416USprimaryCWE-119USCWE-416US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-52301Microsoft Windows Server 2016 - Win32k Elevation of PrivilegePoC · exploit_db
m-cetin/CVE-2023-29336m-cetin/CVE-2023-29336PoC · poc_in_github

affected products (85)

Products and version ranges known to be affected.

Dell NetWorker BMR <19.9.0.6all versionscert_bundDE
Hitachi Storage Virtual Storage Platformall versionscert_bundDEcpe:/h:hitachi:storage:virtual_storage_platform
IGEL OSall versionscert_bundDEcpe:/o:igel:os:-
Microsoft Windows 10all versionscert_bundDEcpe:/o:microsoft:windows_10:-
Microsoft Windows 10 Version 1607all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1607
Microsoft Windows 10 Version 1809all versionscert_bundDEcpe:/o:microsoft:windows_10:version_1809
Microsoft Windows 10 Version 20H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_20h2
Microsoft Windows 10 Version 21H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_21h2
Microsoft Windows 10 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_10:version_22h2
Microsoft Windows 11 Version 22H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_22h2
Microsoft Windows 11 version 21H2all versionscert_bundDE
Microsoft Windows Server 2008 R2 SP1all versionscert_bundDEcpe:/o:microsoft:windows_server_2008_r2:sp_1
Microsoft Windows Server 2008 SP2all versionscert_bundDEcpe:/o:microsoft:windows_server_2008:sp2
Microsoft Windows Server 2012all versionscert_bundDEcpe:/o:microsoft:windows_server_2012:-
Microsoft Windows Server 2012 R2all versionscert_bundDEcpe:/o:microsoft:windows_server_2012_r2:-
Microsoft Windows Server 2016all versionscert_bundDEcpe:/o:microsoft:windows_server_2016:-
Microsoft Windows Server 2019all versionscert_bundDEcpe:/o:microsoft:windows_server_2019:-
Microsoft Windows Server 2022all versionscert_bundDEcpe:/o:microsoft:windows_server_2022:-
Xerox FreeFlow Print Serverall versionscert_bundDEcpe:/a:xerox:freeflow_print_server:v2
Dell Networker≤ BMR <19.9.0.6cert_bundDE

showing 20 of 85

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1178Microsoft Windows und Microsoft Windows Server: Mehrere SchwachstellenDeutsch2023-05-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen und seine Privilegien zu erweitern
msrc_CVE-2023-29336Win32k Elevation of Privilege Vulnerability2023-05-09csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund msrc_csaf NVD CVE.org MITRE

published 2023-05-09modified 2026-06-17

related (12,234)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-109619US	high8.1OT critical	100.0% (100th)	KEV	2026-10-21
PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The g…
CVE-2026-109618US	critical9.8OT critical	100.0% (100th)	KEV	2026-10-21
PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave…
CVE-2026-68820US	—OT critical	0.33% (26th)	KEV	2026-08-11
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-5281US	—OT critical	13.5% (96th)	KEV	2026-04-01
Use after free in Dawn in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to execute arbitrary code via a crafted HTML page…
CVE-2026-2441US	high8.8OT critical	55.0% (99th)	KEV	2026-02-13
Use after free in CSS in Google Chrome prior to 145.0.7632.75 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security sever…

+12229 more

references (9)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan