CVE-2026-27662: Siemens SIMATIC HMI MTP1000, Unified Comfort Panel Neutral

High severity, CVSS 7.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Affected devices do not properly restrict access to the web browser via the Control Panel when no corresponding security mechanisms are in place. This could allow an unauthenticated attacker to gain unauthorized access to the web browser, potentially enabling the discovery of backdoors, performing unauthorized actions, or exploiting misconfigurations that may lead to further system compromise.

Affected products

Siemens SIMATIC HMI MTP1000, Unified Comfort Panel Neutral: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1000 Unified Comfort Panel: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1000 Unified Comfort Panel Hygienic: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1000 Unified Comfort Panel Hygienic Neutral Design: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro For Stand Expandable, Flange At The Bottom: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro For Support Arm Expandable, Round Tube And Extension Unit: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro For Support Arm Not Extendable, Flange On Top: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro Neutral Design For Stand Expandable, Flange At The Bottom: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro Neutral Design For Support Arm Expandable, Round Tube And Extensio: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Comfort Pro Neutral Design For Support Arm Not Extendable, Flange On Top: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Unified Comfort Panel: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Unified Comfort Panel Hygienic: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Unified Comfort Panel Hygienic Neutral Design: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1200 Unified Comfort Panel Neutral Design: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro For Stand Expandable, Flange At The Bottom: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro For Support Arm Expandable, Round Tube And Extension Unit: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro For Support Arm Not Extendable, Flange On Top: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro Neutral Design For Stand Expandable, Flange At The Bottom: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro Neutral Design For Support Arm Expandable, Round Tube And Extensio: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Comfort Pro Neutral Design For Support Arm Not Extendable, Flange On Top: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Unified Comfort Panel: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Unified Comfort Panel Hygienic: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Unified Comfort Panel Hygienic Neutral Design: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1500 Unified Comfort Panel Neutral Design: before V21 (fixed in V21)
Siemens SIMATIC HMI MTP1900 Comfort Pro For Stand Expandable, Flange At The Bottom: before V21 (fixed in V21)
and 25 more

Published 2026-05-12. Last modified 2026-06-17.