CVE-2024-21338

HIGHNVD 7.89.0▲Trending — 5 sources updated this weekExploited in the wild

7.8

Windows Kernel Elevation of Privilege Vulnerability

CVSS v3: 7.8
EG Score: 9.0(high)
EPSS: 99.1%
KEV: ⚠ Exploited

Published

February 13, 2024

Last Modified

October 28, 2025

References (6)

secure@microsofthttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338
af854a3a-2127-422b-91ae-364da2661108https://decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/
af854a3a-2127-422b-91ae-364da2661108https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338
af854a3a-2127-422b-91ae-364da2661108https://packetstorm.news/files/id/190586/
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/52275
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-822Untrusted Pointer Dereference

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2024-213382024-02-13
Windows Kernel Elevation of Privilege Vulnerability

Data Freshness Timeline

(refreshed 11× in last 7d / 14× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 23:37 UTCEG score recompute▲ 1.20
2026-05-31 23:37 UTCVendor advisory
2026-05-31 23:37 UTCGHSA enrichment
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 22:20 UTCkev_newly_listed
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 20:35 UTCkev_newly_listed
2026-05-26 19:13 UTCkev_newly_listed
2026-05-24 08:41 UTCEG score recompute
2026-05-24 08:41 UTCVendor advisory
2026-05-24 08:41 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (8 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCMistyFir/CVE-2024-21338-Exploit
First seen Mar 11, 2026
Open source ↗
Exploit-DBEDB-52275
First seen Apr 22, 2025
Microsoft Windows 11 - Kernel Privilege Escalation
Open source ↗
GitHub PoChackyboiz/kcfg-bypass
First seen Jan 12, 2025
kcfg bypass example - CVE-2024-21338
Open source ↗
GitHub PoCCrowdfense/CVE-2024-21338
First seen Jul 29, 2024
Windows AppLocker Driver (appid.sys) LPE
Open source ↗
GitHub PoCtykawaii98/CVE-2024-21338_PoC
First seen Jun 23, 2024
Open source ↗
GitHub PoCZombie-Kaiser/CVE-2024-21338-x64-build-
First seen May 18, 2024
Local Privilege Escalation from Admin to Kernel vulnerability on Windows 10 and Windows 11 operating systems with HVCI enabled.
Open source ↗
GitHub PoCwusijie/CVE-2024-21338-1
First seen May 5, 2024
PoC for the Untrusted Pointer Dereference in the appid.sys driver
Open source ↗
GitHub PoCUMU618/CVE-2024-21338
First seen Apr 17, 2024
Fork of https://github.com/hakaioffsec/CVE-2024-21338
Open source ↗
GitHub PoChakaioffsec/CVE-2024-21338
First seen Apr 13, 2024
Local Privilege Escalation from Admin to Kernel vulnerability on Windows 10 and Windows 11 operating systems with HVCI enabled.
Open source ↗
Exploit-DBEDB-51946
First seen Apr 2, 2024
Microsoft Windows 10.0.17763.5458 - Kernel Privilege Escalation
Open source ↗

Frequently asked(6)

What is CVE-2024-21338?

CVE-2024-21338 is a high vulnerability published on February 13, 2024. Windows Kernel Elevation of Privilege Vulnerability

When was CVE-2024-21338 disclosed?

CVE-2024-21338 was first published in the National Vulnerability Database on February 13, 2024, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-21338 actively exploited?

Yes. CISA added CVE-2024-21338 to the Known Exploited Vulnerabilities catalog on March 4, 2024, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2024-21338?

CVE-2024-21338 has a CVSS v3 base score of 7.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.

Which products are affected by CVE-2024-21338?

CVE-2024-21338 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2024-21338?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21338, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2024-21338

Explore →

Is Your Infrastructure Affected by CVE-2024-21338?

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CVE-2024-21338

Published

Last Modified

References (6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-21338?

Same vendor

Same CWE

CVE-2024-21338

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-21338?

🔗 Related CVEs(same vendor + same CWE)

Same vendor

Same CWE

Published

Last Modified

References (6)

Frequently asked(6)

Related CVEs(same vendor + same CWE)