CVE-2021-47719: Commax Co., Ltd Commax Webviewer Activex Control

High severity, CVSS 8.7. EPSS: 0.5% chance of exploitation in the next 30 days.

COMMAX WebViewer ActiveX Control 2.1.4.5 contains a buffer overflow vulnerability that allows attackers to execute arbitrary code by providing excessively long string arrays through multiple functions. Attackers can exploit boundary errors in Commax_WebViewer.ocx to cause buffer overflow conditions and potentially gain code execution.

Affected products

Published 2025-12-09. Last modified 2026-06-17.