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Simatic Hmi Comfort Panels FirmwareOperating system · Siemens

CVE-2022-40227

HIGH · 7.5 CVSS v3.1 Published 2022-10-11
Fix available
A fix is available. Upgrade to 17.0 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A vulnerability has been identified in SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions < V17 Update 4), SIMATIC HMI KTP Mobile Panels (All versions < V17 Update 4), SIMATIC HMI KTP1200 Basic (All versions < V17 Update 5), SIMATIC HMI KTP400 Basic (All versions < V17 Update 5), SIMATIC HMI KTP700 Basic (All versions < V17 Update 5), SIMATIC HMI KTP900 Basic (All versions < V17 Update 5), SIPLUS HMI KTP1200 BASIC (All versions < V17 Update 5), SIPLUS HMI KTP400 BASIC (All versions < V17 Update 5), SIPLUS HMI KTP700 BASIC (All versions < V17 Update 5), SIPLUS HMI KTP900 BASIC (All versions < V17 Update 5). Affected devices do not properly validate input sent to certain services over TCP. This could allow an unauthenticated remote attacker to cause a permanent denial of service condition (requiring a device reboot) by sending specially crafted TCP packets.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

SIMATIC HMI panels fail to properly validate input on certain TCP services. An unauthenticated remote attacker can send specially crafted TCP packets that cause a permanent denial of service, requiring a device reboot to recover.

MitigationUpdate affected HMI panels to V17 Update 4 or V17 Update 5 (depending on panel model) to patch the input validation vulnerability in TCP services.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Simatic Hmi Comfort Panels FirmwareOperating system
Affected:< 17.0= 17.0
Simatic Hmi Ktp400 Basic FirmwareOperating system
Affected:< 17.0= 17.0
Simatic Hmi Ktp700 Basic FirmwareOperating system
Affected:< 17.0= 17.0
Simatic Hmi Ktp900 Basic FirmwareOperating system
Affected:< 17.0= 17.0
Simatic Hmi Ktp1200 Basic FirmwareOperating system
Affected:< 17.0= 17.0
Simatic Hmi Ktp Mobile Panels FirmwareOperating system
Affected:< 17.0= 17.0
Siplus Hmi Ktp400 Basic FirmwareOperating system
Affected:< 17.0= 17.0
Siplus Hmi Ktp700 Basic FirmwareOperating system
Affected:< 17.0= 17.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the HMI panel model
    Access the device through its web interface, TIA Portal project, or check the physical device label to determine the exact model (e.g., Simatic HMI Ktp700 Basic, Simatic HMI Comfort Panel, Siplus HMI Ktp400 Basic)
    Affected if The model matches one of the affected product families listed in the CVE
  2. Check the installed firmware version
    Access the device web interface, HMI runtime system information, or use Siemens TIA Portal to read the firmware version. Navigate to the device properties or system information screen showing the current firmware version.
    Affected if The firmware version is less than 17.0 or exactly version 17.0
  3. Verify TCP services are enabled and accessible
    Check the device network configuration to determine which TCP services are enabled (such as HTTP, OPC, S7 communication, or other industrial protocols). Use network scanning tools or review the device configuration in TIA Portal to list active TCP listeners.
    Affected if Any TCP service is enabled and reachable over the network; the vulnerability affects 'certain TCP services' on the device
  4. Assess network exposure of the HMI panel
    Review network architecture to determine if the HMI panel TCP services are accessible from untrusted networks. Check firewall rules, VLAN configuration, and direct IP connectivity to the device.
    Affected if The device TCP services are accessible from untrusted or external networks without proper network segmentation

You are affected if your HMI panel model is one of the listed products AND the firmware version is 17.0 or earlier, and the vulnerable TCP services are network-accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 17.0 or later
Fixed in 17.0
Interim mitigation

Update affected HMI panels to V17 Update 4 or V17 Update 5 (depending on panel model) to patch the input validation vulnerability in TCP services.

Recommended fix High confidence

V17 Update 4 (for Comfort/Mobile Panels) or V17 Update 5 (for Basic Panels)

  1. 1. Back up the current device configuration and project files to a secure location.
  2. 2. Download the firmware update from the Siemens Industry Online Support portal (cert-portal.siemens.com or siemens.com/productsupport).
  3. 3. For SIMATIC HMI Comfort Panels and SIPLUS variants (including KTP Mobile Panels): Upgrade to V17 Update 4 or later.
  4. 4. For SIMATIC HMI KTP1200 Basic, KTP400 Basic, KTP700 Basic, KTP900 Basic, and corresponding SIPLUS variants: Upgrade to V17 Update 5 or later.
  5. 5. Upload the firmware to the HMI device using TIA Portal or the device's web-based management interface, following Siemens update procedures.
  6. 6. After the update completes, verify the firmware version matches the target update version.
  7. 7. Restore the device configuration and verify normal operation.
  8. 8. Confirm the vulnerability is remediated by reviewing the installed firmware version.
Caveat Review Siemens release notes for compatibility with your specific HMI model and TIA Portal version before upgrading; some legacy projects may require updates

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Simatic Hmi Comfort Panels Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-40227 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data