Vendor / Project: Microsoft Product: 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. Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Due Date: 2024-03-25 Ransomware Campaign Use: Known CWEs: CWE-822 Notes: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21338; https://nvd.nist.gov/vuln/detail/CVE-2024-21338