CVE-2021-21791

An information disclosure vulnerability exists in the the way IOBit Advanced SystemCare Ultimate 14.2.0.220 driver handles Privileged I/O read requests. A specially crafted I/O request packet (IRP) can lead to privileged reads in the context of a driver which can result in sensitive information disclosure from the kernel. The IN instruction can read two bytes from the given I/O device, potentially leaking sensitive device data to unprivileged users.

• CWE-782

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1255Exploit, Third Party Advisory
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1255Exploit, Third Party Advisory

Published

Aug 5, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-21786A privilege escalation vulnerability exists in the IOCTL 0x9…7.8
• CVE-2021-21787A privilege escalation vulnerability exists in the way IOBit…8.8
• CVE-2021-21788A privilege escalation vulnerability exists in the way IOBit…8.8
• CVE-2021-21789A privilege escalation vulnerability exists in the way IOBit…8.8
• CVE-2021-2179Vulnerability in the MySQL Server product of Oracle MySQL (c…4.9
• CVE-2021-21790An information disclosure vulnerability exists in the the wa…5.5
• CVE-2021-21792An information disclosure vulnerability exists in the the wa…5.5
• CVE-2021-21793An out-of-bounds write vulnerability exists in the JPG sof_n…8.8
• CVE-2021-21794An out-of-bounds write vulnerability exists in the TIF bits_…7.8
• CVE-2021-21795A heap-based buffer overflow vulnerability exists in the PSD…9.8
• CVE-2021-21796An exploitable use-after-free vulnerability exists in the Ja…7.8
• CVE-2021-21797An exploitable double-free vulnerability exists in the JavaS…7.8