What’s Vulnerable › Vulnerabilities

CVE-2020-28221

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-26 · updated 2026-06-17
• Weakness: CWE-20

Description

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: 3.1, 3.1-sp1a
• Schneider Electric Pro-face BLUE: 3.1, 3.1-sp1a

References

• https://www.se.com/ww/en/download/document/SEVD-2021-012-01/
• https://www.se.com/ww/en/download/document/SEVD-2021-012-01/

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