CVE-2024-21338CISA KEVEPSS p99.0%

CVE-2024-21338Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability

Microsoft / Windows

Description

Microsoft Windows Kernel contains an exposed IOCTL with insufficient access control vulnerability within the IOCTL (input and output control) dispatcher in appid.sys that allows a local attacker to achieve privilege escalation.

Scoring

CVSS 7.8 ()
VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS59.81% probability of exploitation · percentile 99.0% · 2026-07-30T12:03:05Z
Last modified2026-07-31

CISA KEV entry

Added to KEV: 2024-03-04

(incoming)1

TypeTargetConfidenceTier
KEVEntryMicrosoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerabilitykev-cve-2024-213380%live

Related by meaning· 6

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Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.