CVE-2021-21786: Iobit Advanced Systemcare Ultimate

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A privilege escalation vulnerability exists in the IOCTL 0x9c406144 handling of IOBit Advanced SystemCare Ultimate 14.2.0.220. A specially crafted I/O request packet (IRP) can lead to increased privileges. An attacker can send a malicious IRP to trigger this vulnerability.

Affected products

• Iobit Advanced Systemcare Ultimate: version 14.2.0.220 only

Published 2021-07-07. Last modified 2026-06-17.