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Simatic Cp 1242 7 V2 FirmwareOperating system · Siemens

CVE-2022-43716

HIGH · 7.5 CVSS v3.1 Published 2023-04-11
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
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 CP 1242-7 V2 (6GK7242-7KX31-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 (6GK7243-1BX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE EU (6GK7243-7KX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-7 LTE US (6GK7243-7SX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.4.29), SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0) (All versions < V2.3), SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0) (All versions < V2.3), SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0) (All versions < V2.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE0) (All versions < V3.3), SIMATIC CP 443-1 (6GK7443-1EX30-0XE1) (All versions < V3.3), SIMATIC CP 443-1 Advanced (6GK7443-1GX30-0XE0) (All versions < V3.3), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0) (All versions < V2.3), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0) (All versions < V2.3), SIPLUS NET CP 1242-7 V2 (6AG1242-7KX31-7XE0) (All versions < V3.4.29), SIPLUS NET CP 443-1 (6AG1443-1EX30-4XE0) (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (6AG1443-1GX30-4XE0) (All versions < V3.3), SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0) (All versions < V3.4.29), SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0) (All versions < V3.4.29), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.3.6), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.3.6). The webserver of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation which leads to a restart of the webserver of the affected product.

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

The webserver component in SIMATIC CP communication processors contains a vulnerability that allows an attacker to cause a denial of service condition, resulting in a restart of the webserver. This affects the web-based management interface used for device configuration.

MitigationUpdate affected devices to the patched versions: V3.4.29 for CP 1242/1243 series, V2.3 for CP 1542/1543 series, V3.3 for CP 443-1 series, and V2.3.6 for TIM 1531 IRC devices.

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 Cp 1242 7 V2 FirmwareOperating system
Affected:all versions
Simatic Cp 1243 1 FirmwareOperating system
Affected:all versions
Simatic Cp 1243 1 Dnp3 FirmwareOperating system
Affected:all versions
Simatic Cp 1243 1 Iec FirmwareOperating system
Affected:all versions
Simatic Cp 1243 7 Lte Eu FirmwareOperating system
Affected:all versions
Simatic Cp 1243 7 Lte Us FirmwareOperating system
Affected:all versions
Simatic Cp 1243 8 Irc FirmwareOperating system
Affected:all versions
Simatic Cp 1542sp 1 FirmwareOperating system
Affected:all versions

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 SIMATIC CP model
    Locate the device physically or check the device inventory/configuration management system to determine if the deployed device is one of: CP 1242 7, CP 1243 1, CP 1243 1 Dnp3, CP 1243 1 Iec, CP 1243 7 Lte Eu, CP 1243 7 Lte Us, CP 1243 8 Irc, or CP 1542sp 1
    Affected if The device is any of these specific CP models
  2. Check the installed firmware version
    Access the device via its web-based management interface or use the dedicated configuration tool (e.g., TIA Portal) to retrieve the current firmware version installed on the CP module
    Affected if The firmware version is any version (all versions of the listed products are affected)
  3. Verify web-based management is enabled
    Check the device configuration settings to determine if the webserver/web-based management interface is currently enabled on the CP device
    Affected if Web-based management interface is enabled and accessible on the network

You are affected if you have deployed any of the listed CP models (CP 1242 7, CP 1243 series, or CP 1542sp 1) with web-based management enabled, regardless of firmware version since all versions are vulnerable.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update affected devices to the patched versions: V3.4.29 for CP 1242/1243 series, V2.3 for CP 1542/1543 series, V3.3 for CP 443-1 series, and V2.3.6 for TIM 1531 IRC devices.

Recommended fix High confidence

CP 1242-7 V2 / CP 1243-1 series: upgrade to V3.4.29 or later; CP 1542SP-1 / CP 1543SP-1 series: upgrade to V2.3 or later; CP 443-1 series: upgrade to V3.3 or later; TIM 1531 IRC: upgrade to V2.3.6 or later

  1. 1. Identify the exact model number and current firmware version of the affected SIMATIC CP device using the Siemens industrial management software or device web interface.
  2. 2. Navigate to the Siemens Product Security Advisories page (cert-portal.siemens.com) and locate CVE-2022-43716 to obtain the official patch and firmware upgrade instructions.
  3. 3. For CP 1242-7 V2, CP 1243-1, CP 1243-1 DNP3, CP 1243-1 IEC, CP 1243-7 LTE EU, CP 1243-7 LTE US, and CP 1243-8 IRC: upgrade firmware to version V3.4.29 or later.
  4. 4. For CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1, and SIPLUS variants: upgrade firmware to version V2.3 or later.
  5. 5. For CP 443-1 and CP 443-1 Advanced: upgrade firmware to version V3.3 or later.
  6. 6. For TIM 1531 IRC and SIPLUS TIM 1531 IRC: upgrade firmware to version V2.3.6 or later.
  7. 7. After upgrading, verify the webserver functionality and confirm the vulnerability is remediated.
  8. 8. Implement network segmentation and disable the webserver if not required, as an additional compensating control.
Caveat Firmware upgrades in industrial control devices may require downtime and should be tested in a staging environment first; ensure compatibility with existing PLC programs and communication configurations before production deployment

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

Fix this in Simatic Cp 1242 7 V2 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2022-43716 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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