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High SSA-387223 1 CVE

SSA-387223: Unauthenticated Control Panel Escape Vulnerability on SIMATIC HMI Unified Comfort before V21.0

Published May 12, 2026 · Updated May 12, 2026

Vendor: Siemens Product: SIMATIC HMI MTP1000 Unified Comfort Panel (6AV2128-3KB06-0AX1) Product: SIMATIC HMI MTP1000 Unified Comfort Panel hygienic (6AV2128-3KB40-0AX0) Product: SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design (6AV2128-3KB70-0AX0) Product: SIMATIC HMI MTP1000, Unified Comfort Panel neutral (6AV2128-3KB36-0AX1) Product: SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit Product: SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top) Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio Product: SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top) Product: SIMATIC HMI MTP1200 Unified Comfort Panel (6AV2128-3MB06-0AX1) Product: SIMATIC HMI MTP1200 Unified Comfort Panel hygienic (6AV2128-3MB40-0AX0) Product: SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design (6AV2128-3MB70-0AX0) Product: SIMATIC HMI MTP1200 Unified Comfort Panel neutral design (6AV2128-3MB36-0AX1) Product: SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit Product: SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top) Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio Product: SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top) Product: SIMATIC HMI MTP1500 Unified Comfort Panel (6AV2128-3QB06-0AX1) Product: SIMATIC HMI MTP1500 Unified Comfort Panel hygienic (6AV2128-3QB40-0AX0) Product: SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design (6AV2128-3QB70-0AX0) Product: SIMATIC HMI MTP1500 Unified Comfort Panel neutral design (6AV2128-3QB36-0AX1) Product: SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit Product: SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top) Product: SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom) Product: SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio +21 more

Summary

SIMATIC HMI Unified Comfort Panels before V21.0 are affected by a vulnerability that allows an unauthenticated attacker to access the web browser via the help link.
This vulnerability allows an attacker to access the web browser through the Control Panel if it is not protected by the corresponding security mechanisms. This opens the possibility for the attacker to find backdoors, which might lead to unwanted misconfigurations.

Siemens has released new versions for the affected products and recommends to update to the latest versions.

Vulnerabilities 1

Revision history

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References