CVE-2023-28657: Contec Conprosys HMI System

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Improper access control vulnerability exists in CONPROSYS HMI System (CHS) versions prior to 3.5.3. A user of the PC where the affected product is installed may gain an administrative privilege. As a result, information regarding the product may be obtained and/or altered by the user.

Affected products

• Contec Conprosys HMI System: before 3.5.3 (fixed in 3.5.3)

Published 2023-06-01. Last modified 2026-06-17.