CVE-2021-43555: Myscada Mydesigner

High severity, CVSS 7.8. EPSS: 38.2% chance of exploitation in the next 30 days.

mySCADA myDESIGNER Versions 8.20.0 and prior fails to properly validate contents of an imported project file, which may make the product vulnerable to a path traversal payload. This vulnerability may allow an attacker to plant files on the file system in arbitrary locations or overwrite existing files, resulting in remote code execution.

Affected products

• Myscada Mydesigner: up to and including 8.20.0

Published 2021-11-19. Last modified 2026-06-17.