CVE-2024-21338

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.598 · 99 %ileexploit · PoCDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 11 exploits · PoC

Likely / severe?

59.8% (99th) EPSS

CVSS 7.8 · high

Is it mine?

90 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2024-03-04remediate by 2024-03-25

required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

EPSS · scored 2026-10-26

Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability

Windows Kernel Elevation of Privilege Vulnerability

remediations

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

A vendor fix is available.

FixedWindows 10 Version 1809 for 32-bit Systemsmsrc_csaf
10.0.17763.5458:Security Update:https://support.microsoft.com/help/5034768
https://support.microsoft.com/help/5034768
FixedWindows 10 Version 1809 for ARM64-based Systemsmsrc_csaf
10.0.17763.5458:Security Update:https://support.microsoft.com/help/5034768
https://support.microsoft.com/help/5034768
FixedWindows 10 Version 1809 for x64-based Systemsmsrc_csaf
10.0.17763.5458:Security Update:https://support.microsoft.com/help/5034768
https://support.microsoft.com/help/5034768
FixedWindows 10 Version 21H2 for 32-bit Systemsmsrc_csaf
10.0.19044.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 10 Version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.19044.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 10 Version 21H2 for x64-based Systemsmsrc_csaf
10.0.19044.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 10 Version 22H2 for 32-bit Systemsmsrc_csaf
10.0.19045.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 10 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.19045.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 10 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.19045.4046:Security Update:https://support.microsoft.com/help/5034763
https://support.microsoft.com/help/5034763
FixedWindows 11 Version 22H2 for ARM64-based Systemsmsrc_csaf
10.0.22621.3155:Security Update:https://support.microsoft.com/help/5034765
https://support.microsoft.com/help/5034765
FixedWindows 11 Version 22H2 for x64-based Systemsmsrc_csaf
10.0.22621.3155:Security Update:https://support.microsoft.com/help/5034765
https://support.microsoft.com/help/5034765
FixedWindows 11 Version 23H2 for ARM64-based Systemsmsrc_csaf
10.0.22631.3155:Security Update:https://support.microsoft.com/help/5034765
https://support.microsoft.com/help/5034765
FixedWindows 11 Version 23H2 for x64-based Systemsmsrc_csaf
10.0.22631.3155:Security Update:https://support.microsoft.com/help/5034765
https://support.microsoft.com/help/5034765
FixedWindows 11 version 21H2 for ARM64-based Systemsmsrc_csaf
10.0.22000.2777:Security Update:https://support.microsoft.com/help/5034766
https://support.microsoft.com/help/5034766
FixedWindows 11 version 21H2 for x64-based Systemsmsrc_csaf
10.0.22000.2777:Security Update:https://support.microsoft.com/help/5034766
https://support.microsoft.com/help/5034766
FixedWindows Server 2019msrc_csaf
10.0.17763.5458:Security Update:https://support.microsoft.com/help/5034768
https://support.microsoft.com/help/5034768
FixedWindows Server 2019 (Server Core installation)msrc_csaf
10.0.17763.5458:Security Update:https://support.microsoft.com/help/5034768
https://support.microsoft.com/help/5034768
FixedWindows Server 2022msrc_csaf
10.0.20348.2322:Security Update:https://support.microsoft.com/help/5034770
https://support.microsoft.com/help/5034770
FixedWindows Server 2022 (Server Core installation)msrc_csaf
10.0.20348.2322:Security Update:https://support.microsoft.com/help/5034770
https://support.microsoft.com/help/5034770
FixedWindows Server 2022, 23H2 Edition (Server Core installation)msrc_csaf
10.0.25398.709:Security Update:https://support.microsoft.com/help/5034769
https://support.microsoft.com/help/5034769

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:F/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:F/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-264USCWE-269USCWE-822USCWE-822US

exploits (11)

Public proof-of-concept and weaponised exploit code.

EDB-51946Microsoft Windows 10.0.17763.5458 - Kernel Privilege EscalationPoC · exploit_db
EDB-52275Microsoft Windows 11 - Kernel Privilege EscalationPoC · exploit_db
Crowdfense/CVE-2024-21338Windows AppLocker Driver (appid.sys) LPEPoC · poc_in_github
MistyFir/CVE-2024-21338-ExploitMistyFir/CVE-2024-21338-ExploitPoC · poc_in_github
UMU618/CVE-2024-21338Fork of https://github.com/hakaioffsec/CVE-2024-21338PoC · poc_in_github
Zombie-Kaiser/CVE-2024-21338-x64-build-Local Privilege Escalation from Admin to Kernel vulnerability on Windows 10 and Windows 11 operating systems with HVCI enabled.PoC · poc_in_github

affected products (90)

Products and version ranges known to be affected.

Hitachi Storageall versionscert_bundDEcpe:/h:hitachi:storage:-
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 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 23H2all versionscert_bundDEcpe:/o:microsoft:windows_11:version_23h2
Microsoft Windows 11 version 21H2all versionscert_bundDE
Microsoft Windows Server 2008 R2 SP1all versionscert_bundDEcpe:/o:microsoft:windows_server:2008_r2_sp1
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:-
Microsoft Windows Server 2022 23H2 Editionall versionscert_bundDEcpe:/o:microsoft:windows_server_2022:23h2_edition
Microsoft Windows 11≤ version 21H2cert_bundDE
Microsoft Windows 10 Version 180910.0.0 → 10.0.17763.5458enisa_euvdEU
Microsoft Windows 10 Version 180910.0.17763.0 → 10.0.17763.5458enisa_euvdEU

showing 20 of 90

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-0387Microsoft Windows und Microsoft Windows Server: Mehrere SchwachstellenDeutsch2024-02-13csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler 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, seine Privilegien zu erweitern und Informationen falsch darzustellen.
msrc_CVE-2024-21338Windows Kernel Elevation of Privilege Vulnerability2024-02-13csaf · 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 2024-02-13modified 2026-08-10

references (11)

External citations — patches, advisories, analysis.

scry

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