CVE-2021-43000: Amzetta Zportal Windows Zclient

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Amzetta zPortal Windows zClient is affected by Buffer Overflow. IOCTL Handler 0x22001B in the Amzetta zPortal Windows zClient <= v3.2.8180.148 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

Affected products

• Amzetta Zportal Windows Zclient: up to and including 3.2.8180.148

Published 2021-12-07. Last modified 2026-06-17.