Siemens Control Panel Browser Access Bypass (CVE-2026-27662)
CVE-2026-27662 Published on May 12, 2026

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.

NVD

Weakness Type

Insecure Default Initialization of Resource

The software initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.

Affected Versions

Siemens SIMATIC HMI MTP1000 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic:

Before V21 is affected.

Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1000, Unified Comfort Panel neutral:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1200 Unified Comfort Panel neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1500 Unified Comfort Panel neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP1900 Unified Comfort Panel neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro for support arm (expandable, round tube) and extension unit:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for stand (expandable, flange at the bottom):

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (not extendable, flange on top):

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Unified Comfort Hygienic:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Unified Comfort Hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP2200 Unified Comfort Panel neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP700 Unified Comfort Panel:

Before V21 is affected.

Siemens SIMATIC HMI MTP700 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP700 Unified Comfort Panel hygienic neutral design:

Before V21 is affected.

Siemens SIMATIC HMI MTP700, Unified Comfort Panel neutral design:

Before V21 is affected.

Siemens SIPLUS HMI MTP1000 Unified Comfort:

Before V21 is affected.

Siemens SIPLUS HMI MTP1200 Unified Comfort:

Before V21 is affected.

Siemens SIPLUS HMI MTP700 Unified Comfort:

Before V21 is affected.

Siemens Control Panel Browser Access Bypass (CVE-2026-27662)CVE-2026-27662 Published on May 12, 2026

Weakness Type

Insecure Default Initialization of Resource

Affected Versions

Siemens Control Panel Browser Access Bypass (CVE-2026-27662)
CVE-2026-27662 Published on May 12, 2026