CVE-2021-42705: We-Con PLC Editor

High severity, CVSS 7.8. EPSS: 1% chance of exploitation in the next 30 days.

PLC Editor Versions 1.3.8 and prior is vulnerable to a stack-based buffer overflow while processing project files, which may allow an attacker to execute arbitrary code.

Affected products

• We-Con PLC Editor: up to and including 1.3.8

Published 2021-11-22. Last modified 2026-06-17.