Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
Windows Kernel Elevation of Privilege Vulnerability
What happened
Windows Kernel Elevation of Privilege Vulnerability
CISA lists it as exploited, added 04 Mar 2024.
Does it affect you
Names Microsoft Windows Server. Enter the product and version you run to place it against the affected range the vendor published.
What to do
- Apply the vendor patch named in this advisory.
msrc.microsoft.com - Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
cisa.gov
CISA’s notes for this entry:
Affected, as published to NVD
- ms-winserver
- Microsoft Windows Server: everything below 10.0.17763.5458
The record
- NVD status
- Analyzed
- Published
- 13 Feb 2024, last modified 10 Aug 2026 (NVD)
- Severity
- CVSS 3.1 base score 7.8, High — computed here from the vector; NVD states 7.8.
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-822 Untrusted Pointer Dereference (NVD; names by MITRE)
- Exploitation
- Listed in CISA’s Known Exploited Vulnerabilities catalogue since 04 Mar 2024; federal remediation due 25 Mar 2024. CISA records known use in ransomware campaigns. CISA entry
- Exploit probability
- EPSS 59.8%, 99th percentile — FIRST, scored 23 Oct 2026. FIRST EPSS
- Vendor
- Microsoft · Windows (CISA)
References on the NVD record
- msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338PatchVendor Advisory
- decoded.avast.io/janvojtesek/lazarus-and-the-fudmodule-rootkit-beyond-byovd-with-an-admin-to-kernel-zero-day/ExploitTechnical DescriptionThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21338US Government Resource
- packetstorm.news/files/id/190586/ExploitVDB Entry
- exploit-db.com/exploits/52275ExploitVDB Entry
Sources
The verdict above is computed from the products and versions you entered and the affected ranges the vendor published to NVD. It does not inspect your environment, and this site never reports a product as unaffected: why.