CVE-2021-43771: Trend Micro Antivirus

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

Trend Micro Antivirus for Mac 2021 v11 (Consumer) is vulnerable to an improper access control privilege escalation vulnerability that could allow an attacker to establish a connection that could lead to full local privilege escalation within the application. Please note that an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

Affected products

• Trend Micro Antivirus: from 11.0, before 11.0.2163 (fixed in 11.0.2163)

Published 2021-11-30. Last modified 2026-06-17.