CVE record · CVE-2026-27662

Affected devices do not properly restrict access to the web browser via the Control Panel when no corresponding security mechanisms are in place.

CVSS 7.0 HighEPSS 0.0011 · 1st percentile

Published by the CVE Program (CNA: siemens) at 12 May 2026, 08:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Siemens	SIMATIC HMI MTP1000 Unified Comfort Panel	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1000 Unified Comfort Panel hygienic	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1000, Unified Comfort Panel neutral	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Unified Comfort Panel	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Unified Comfort Panel hygienic	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1200 Unified Comfort Panel neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Unified Comfort Panel	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Unified Comfort Panel hygienic	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1500 Unified Comfort Panel neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Unified Comfort Panel	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Unified Comfort Panel hygienic	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Unified Comfort Panel hygienic neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP1900 Unified Comfort Panel neutral design	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro for support arm (expandable, round tube) and extension unit	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro neutral design for stand (expandable, flange at the bottom)	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio	affected before V21 custom Other versions: unknown
Siemens	SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (not extendable, flange on top)	affected before V21 custom Other versions: unknown

And 11 more products. The full list is on the CVE record.

Identifiers: CVE-2026-27662
CNA: siemens
Weakness (CWE): CWE-1188
Tags: Siemens SIMATIC HMI MTP1000 Unified Comfort Panel
Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic
Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design
Siemens SIMATIC HMI MTP1000, Unified Comfort Panel neutral
Siemens SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom)
Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit
Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top)
Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom)
CWE-1188
Published: 12 May 2026
Updated: 13 May 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.7	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	CNA (siemens)
7.0	High	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N	CNA (siemens)Used for this record

CISA KEV Not listed.
EPSS 0.0011, the 1st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 12 May 2026. New records show when each source confirmed them.

Sources

References from the CNA

cert-portal.siemens.com/productcert/html/ssa-387223.html

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.