Microsoft Windows Kernel Exposed IOCTL with Insufficient Access Control
Microsoft Windows
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. Added to the CISA KEV catalog on 2024-03-04. CISA lists known use in ransomware campaigns.
Why this severity: CVSS 7.8 (v3.1, CNA), actively exploited (CISA KEV); known ransomware use
- Started
- Feb 13, 2024
- Closed
- Mar 4, 2024
Affected
- See vendor advisory (versions are not listed in the KEV record)
Fixed in
- See vendor advisory linked in sources
Timeline2
Advisories3
Notes & caveats
Derived from the CISA KEV JSON feed (catalogVersion 2026.10.21); CVSS from the CVE record (cveawg.mitre.org). startedAt is the CVE publication date when it fell in 2024 before the KEV listing, else the KEV dateAdded; exploitation may have begun earlier. closedAt is the KEV listing date (a fix or mitigation was available then unless noted).
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