CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

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

criticalknown exploitedpublic exploitCVE-2024-21338
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Microsoftproduct: WindowsPrivilege escalation
What
An exposed IOCTL with insufficient access control allows local attackers to achieve privilege escalation.
Who is affected
Users of Microsoft Windows are affected.
Urgency
Remediation is urgent as the vulnerability has been exploited in the wild.
Action
Apply the security update programs through Microsoft Update.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Windows

Get an email when a new Windows advisory drops — max one per day, one-click unsubscribe.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2024-03-04
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-21338

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2024-21338coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Kernel

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CISA Known Exploited Vulnerabilities