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Fencer Intel
high 7.7

CVE-2026-27662 json

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

published 5mo ago modified 14d ago also EUVD-2026-29429

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 1%
public exploits
0
none known

Summary

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.

Patch / fix

  • Siemens SIMATIC HMI MTP1000 Unified Comfort Panel V21
  • Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic V21
  • Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design V21
  • Siemens SIMATIC HMI MTP1000, Unified Comfort Panel neutral V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top) V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio V21
  • Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top) V21
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel V21
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic V21
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design V21
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel neutral design V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top) V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio V21
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top) V21
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel V21
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic V21
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design V21
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel neutral design V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top) V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom) V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio V21
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top) V21

Is CVE-2026-27662 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-26-134-07 updated cvss 7.7

Siemens SIMATIC

  • Siemens SIMATIC HMI MTP700 Unified Comfort Panel (6AV2128-3GB06-0AX1) < 21 Siemens SIMATIC HMI MTP700 Unified Comfort Panel hygienic neutral design (6AV2128-3GB40-0AX0) < 21 Siemens SIMATIC HMI MTP700 Unified Comfort Panel hygienic neutral design (6AV2128-3GB70-0AX0) < 21 Siemens SIMATIC HMI MTP700, Unified Comfort Panel neutral design (6AV2128-3GB36-0AX1) < 21 Siemens SIMATIC HMI MTP1000 Unified Comfort Panel (6AV2128-3KB06-0AX1) < 21 Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic (6AV2128-3KB40-0AX0) < 21
    +34 more products
    Siemens SIMATIC HMI MTP1000 Unified Comfort Panel hygienic neutral design (6AV2128-3KB70-0AX0) < 21 Siemens SIMATIC HMI MTP1000, Unified Comfort Panel neutral (6AV2128-3KB36-0AX1) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro for stand (expandable, flange at the bottom) (6AV2128-3MB27-1BX0) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (expandable, round tube) and extension unit (6AV2128-3MB27-0BX0) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro for support arm (not extendable, flange on top) (6AV2128-3MB27-0AX0) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for stand (expandable, flange at the bottom) (6AV2128-3MB57-1BX0) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio (6AV2128-3MB57-0BX0) < 21 Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top) (6AV2128-3MB57-0AX0) < 21 Siemens SIMATIC HMI MTP1200 Unified Comfort Panel (6AV2128-3MB06-0AX1) < 21 Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic (6AV2128-3MB40-0AX0) < 21 Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design (6AV2128-3MB70-0AX0) < 21 Siemens SIMATIC HMI MTP1200 Unified Comfort Panel neutral design (6AV2128-3MB36-0AX1) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom) (6AV2128-3QB27-1BX0) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit (6AV2128-3QB27-0BX0) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top) (6AV2128-3QB27-0AX0) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom) (6AV2128-3QB57-1BX0) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio (6AV2128-3QB57-0BX0) < 21 Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top) (6AV2128-3QB57-0AX0) < 21 Siemens SIMATIC HMI MTP1500 Unified Comfort Panel (6AV2128-3QB06-0AX1) < 21 Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic (6AV2128-3QB40-0AX0) < 21 Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design (6AV2128-3QB70-0AX0) < 21 Siemens SIMATIC HMI MTP1500 Unified Comfort Panel neutral design (6AV2128-3QB36-0AX1) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom) (6AV2128-3UB27-1BX0) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit (6AV2128-3UB27-0BX0) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top) (6AV2128-3UB27-0AX0) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom) (6AV2128-3UB57-1BX0) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio (6AV2128-3UB57-0BX0) < 21 Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top) (6AV2128-3UB57-0AX0) < 21 Siemens SIMATIC HMI MTP1900 Unified Comfort Panel (6AV2128-3UB06-0AX1) < 21 Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic (6AV2128-3UB40-0AX0) < 21 Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic neutral design (6AV2128-3UB70-0AX0) < 21 Siemens SIMATIC HMI MTP1900 Unified Comfort Panel neutral design (6AV2128-3UB36-0AX1) < 21 Siemens SIMATIC HMI MTP2200 Comfort Pro for stand (expandable, flange at the bottom) (6AV2128-3XB27-1BX0) < 21 Siemens SIMATIC HMI MTP2200 Comfort Pro for support arm (expandable, round tube) and extension unit (6AV2128-3XB27-0BX0) < 21
    affected: fixed in V21, mitigation support.industry.siemens.com

11 more affected in the full advisory

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5mo ago

Exploit prediction

0.11% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CNA 4.0 7.0 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 4.0 7.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected products

  • 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)
  • Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio
  • Siemens SIMATIC HMI MTP1200 Comfort Pro neutral design for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel hygienic neutral design
  • Siemens SIMATIC HMI MTP1200 Unified Comfort Panel neutral design
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (expandable, round tube) and extension unit
  • Siemens SIMATIC HMI MTP1500 Comfort Pro for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (expandable, round tube) and extensio
  • Siemens SIMATIC HMI MTP1500 Comfort Pro neutral design for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel hygienic neutral design
  • Siemens SIMATIC HMI MTP1500 Unified Comfort Panel neutral design
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (expandable, round tube) and extension unit
  • Siemens SIMATIC HMI MTP1900 Comfort Pro for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (expandable, round tube) and extensio
  • Siemens SIMATIC HMI MTP1900 Comfort Pro neutral design for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP1900 Unified Comfort Panel
  • Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic
  • Siemens SIMATIC HMI MTP1900 Unified Comfort Panel hygienic neutral design
  • Siemens SIMATIC HMI MTP1900 Unified Comfort Panel neutral design
  • Siemens SIMATIC HMI MTP2200 Comfort Pro for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP2200 Comfort Pro for support arm (expandable, round tube) and extension unit
  • Siemens SIMATIC HMI MTP2200 Comfort Pro for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for stand (expandable, flange at the bottom)
  • Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (expandable, round tube) and extensio
  • Siemens SIMATIC HMI MTP2200 Comfort Pro neutral design for support arm (not extendable, flange on top)
  • Siemens SIMATIC HMI MTP2200 Unified Comfort Hygienic
  • Siemens SIMATIC HMI MTP2200 Unified Comfort Hygienic neutral design
  • Siemens SIMATIC HMI MTP2200 Unified Comfort Panel
  • Siemens SIMATIC HMI MTP2200 Unified Comfort Panel neutral design
  • Siemens SIMATIC HMI MTP700 Unified Comfort Panel
  • Siemens SIMATIC HMI MTP700 Unified Comfort Panel hygienic neutral design
  • Siemens SIMATIC HMI MTP700, Unified Comfort Panel neutral design
  • Siemens SIPLUS HMI MTP1000 Unified Comfort
  • Siemens SIPLUS HMI MTP1200 Unified Comfort
  • Siemens SIPLUS HMI MTP700 Unified Comfort

Classification

Weakness
  • CWE-1188 Initialization of a Resource with an Insecure Default

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.