CVE-2020-28221: Schneider Electric Ecostruxure Operator Terminal Expert

Critical severity, CVSS 9.8. EPSS: 2.1% chance of exploitation in the next 30 days.

A CWE-20: Improper Input Validation vulnerability exists in EcoStruxure™ Operator Terminal Expert and Pro-face BLUE (version details in the notification) that could cause arbitrary code execution when the Ethernet Download feature is enable on the HMI.

Affected products

• Schneider Electric Ecostruxure Operator Terminal Expert: version 3.1 only
• Schneider Electric Pro-Face Blue: version 3.1 only

Published 2021-01-26. Last modified 2026-06-17.