CVE-2019-6528: Psigridconnect IEC104 Security Proxy Firmware

High severity, CVSS 8.8. EPSS: 2.6% chance of exploitation in the next 30 days.

PSI GridConnect GmbH Telecontrol Gateway and Smart Telecontrol Unit family, IEC104 Security Proxy versions Telecontrol Gateway 3G Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Telecontrol Gateway XS-MU Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Telecontrol Gateway VM Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Smart Telecontrol Unit TCG Versions 5.0.27, 5.1.19, 6.0.16 and prior, and IEC104 Security Proxy Version 2.2.10 and prior The web application browser interprets input as active HTML, JavaScript, or VBScript, which could allow an attacker to execute arbitrary code.

Affected products

• Psigridconnect IEC104 Security Proxy Firmware: up to and including 2.2.10
• Psigridconnect Smart Telecontrol Unit Tcg Firmware: before 5.1.20 (fixed in 5.1.20); from 5.1.21, before 6.0.16 (fixed in 6.0.16)
• Psigridconnect Telecontrol Gateway 3g Firmware: before 5.1.20 (fixed in 5.1.20); from 5.1.21, before 6.0.16 (fixed in 6.0.16)
• Psigridconnect Telecontrol Gateway Vm Firmware: before 5.1.20 (fixed in 5.1.20); from 5.1.21, up to and including 6.0.16
• Psigridconnect Telecontrol Gateway Xs-Mu Firmware: before 5.1.20 (fixed in 5.1.20); from 5.1.21, up to and including 6.0.16

Published 2019-03-05. Last modified 2026-06-17.