CVE-2024-21338

CISA KEV RANSOMWARE

ACT NOW Priority: 0.00 BB Relevance: 10/100

Published: N/A Modified: N/A First seen: 2026-10-29 Status: pending_score

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.

CISA Known Exploited Vulnerability

Vendor / Product Microsoft — Windows

Date Added 2024-03-04

Remediation Due 2024-03-25

Ransomware Use CONFIRMED

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338; https://nvd.nist.gov/vuln/detail/CVE-2024-21338

Weakness Classification (1)

CWE-822

Affected Software (9)

Vendor	Product	Version
microsoft	windows_10_1809	< 10.0.17763.5458
microsoft	windows_10_21h2	< 10.0.19044.4046
microsoft	windows_10_22h2	< 10.0.19045.4046
microsoft	windows_11_21h2	< 10.0.22000.2777
microsoft	windows_11_22h2	< 10.0.22621.3155
microsoft	windows_11_23h2	< 10.0.22631.3155
microsoft	windows_server_2019	< 10.0.17763.5458
microsoft	windows_server_2022	< 10.0.20348.2322
microsoft	windows_server_2022_23h2	< 10.0.25398.709