HIGHCVSS 7.8Actively exploited · CISA KEV since 2024-03-04Vulnerability
CVE-2024-21338
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.
Properties
- Euvd product
- Windows Server 2022, Windows 10 Version 1809, Windows 11 version 21H2, Windows Server 2022, 23H2 Edition (Server Core installation), Windows 11 Version 23H2, Windows Server 2019, Windows 10 Version 21H2, Windows 11 version 22H2, Windows 10 Version 22H2, Windows Server 2019 (Server Core installation), Windows 11 version 22H3
- Vulnerability name
- Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control Vulnerability
- First seen
- 2026-08-10T17:52:20+00:00
- Cvss score
- 7.8
- Epss score
- 0.5981
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2024-03-25
- Euvd assigner
- microsoft
- Retrieved at
- 2026-10-21T01:24:47+00:00
- Exploited euvd since
- 2024-03-04T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2024-03-04
- Euvd base score version
- 3.1
- Score
- 7.8
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Microsoft
- Cvss vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 7.8
Related Entities (12)
AFFECTS_PRODUCT (9)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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