Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
Microsoft — Windows 10 Version 1809
Windows Kernel Elevation of Privilege Vulnerability
7.8
51.9%
Vector breakdown
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
- Published
- Feb 13, 2024
- Modified
- Oct 21, 2025
- Added to KEV
- Mar 4, 2024
- Federal patch due
- Mar 25, 2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2024-21338, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2024-21338 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2024-21338?
Windows Kernel Elevation of Privilege Vulnerability
How severe is CVE-2024-21338?
CVE-2024-21338 has a CVSS base score of 7.8 out of 10 (CVSS 3.1).
Is CVE-2024-21338 actively exploited in the wild?
Yes. CVE-2024-21338 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Mar 4, 2024, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2024-21338?
51.9% - meaning FIRST.org's EPSS model estimates a 51.9% probability this vulnerability will be exploited in the wild within 30 days (99% percentile among all scored CVEs).
What type of vulnerability is CVE-2024-21338?
CVE-2024-21338 is classified under CWE-822 (CWE-822: Untrusted Pointer Dereference).
Cross-checked against
Impactr finds and proves whether CVE-2024-21338 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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