ICSA-25-322-05

Vulnerability from csaf_cisa - Published: 2025-11-18 12:00 - Updated: 2025-11-18 12:00
Summary
METZ CONNECT EWIO2

Notes

Summary
A critical authentication bypass in EWIO-2 allows unauthenticated attackers with network access to gain administrative control over the device. Once compromised, an attacker can change configurations, manipulate data, disrupt services, and potentially render the device non-functional.
Impact
Due to these vulnerabilities an unauthenticated attacker can take over control of the device. The data integrity as well as the device availability could no longer be guaranteed.
Remediation
METZ CONNECT has released a new SW-Version 2.2.0. Install version 2.2.0 or later to remediate this vulnerability. Schedule the update at your next maintenance window. No workaround offers equivalent protection.
Product Description
Compact Ethernet I/O controller that bridges field signals to IP networks. It acts as a Modbus TCP or BACnet/IP server (plus Modbus RTU for field devices) and includes a web-based Node‑RED environment for simple logic, visualization, and data logging—ideal for building and industrial automation.
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Advisory Conversion Disclaimer
This ICSA is a verbatim republication of METZ CONNECT GmbH VDE-2025-097 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided "as-is" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact METZ CONNECT GmbH directly for any questions regarding this advisory.
Critical infrastructure sectors
Critical Manufacturing
Countries/areas deployed
Worldwide
Company headquarters location
Germany
Recommended Practices
CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability.
Recommended Practices
Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.
Recommended Practices
Locate control system networks and remote devices behind firewalls and isolate them from business networks.
Recommended Practices
When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.
Recommended Practices
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
Recommended Practices
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Recommended Practices
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Recommended Practices
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
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        "category": "summary",
        "text": "A critical authentication bypass in EWIO-2 allows unauthenticated attackers with network access to gain administrative control over the device. Once compromised, an attacker can change configurations, manipulate data, disrupt services, and potentially render the device non-functional.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "Due to these vulnerabilities an unauthenticated attacker can take over control of the device. The data integrity as well as the device availability could no longer be guaranteed.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "METZ CONNECT has released a new SW-Version 2.2.0. Install version 2.2.0 or later to remediate this vulnerability. Schedule the update at your next maintenance window. No workaround offers equivalent protection.",
        "title": "Remediation"
      },
      {
        "category": "description",
        "text": "Compact Ethernet I/O controller that bridges field signals to IP networks. It acts as a Modbus TCP or BACnet/IP server (plus Modbus RTU for field devices) and includes a web-based Node\u2011RED environment for simple logic, visualization, and data logging\u2014ideal for building and industrial automation.",
        "title": "Product Description"
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        "text": "This ICSA is a verbatim republication of METZ CONNECT GmbH VDE-2025-097 from a direct conversion of the vendor\u0027s Common Security Advisory Framework (CSAF) advisory. This is republished to CISA\u0027s website as a means of increasing visibility and is provided \"as-is\" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory.  Further, CISA does not endorse any commercial product or service.  Please contact METZ CONNECT GmbH directly for any questions regarding this advisory.",
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        "title": "Recommended Practices"
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        "title": "Recommended Practices"
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      {
        "category": "general",
        "text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.",
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      {
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        "summary": "Energy-Controlling M-Bus No. 110930 ",
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  "vulnerabilities": [
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      "cve": "CVE-2025-41733",
      "cwe": {
        "id": "CWE-305",
        "name": "Authentication Bypass by Primary Weakness"
      },
      "notes": [
        {
          "category": "description",
          "text": "The commissioning wizard on the affected devices does not validate if the device is already initialized. An unauthenticated remote attacker can construct POST requests to set root credentials.",
          "title": "Vulnerability Description"
        }
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          "group_ids": [
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 9.8,
            "environmentalSeverity": "CRITICAL",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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          "products": [
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            "CSAFPID-0007",
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      "title": "Possible malfunction credential injection"
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        "id": "CWE-98",
        "name": "Improper Control of Filename for Include/Require Statement in PHP Program (\u0027PHP Remote File Inclusion\u0027)"
      },
      "notes": [
        {
          "category": "description",
          "text": "An unauthenticated remote attacker can execute arbitrary php files and gain full access of the affected devices.",
          "title": "Vulnerability Description"
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          "group_ids": [
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            "confidentialityImpact": "HIGH",
            "environmentalScore": 9.8,
            "environmentalSeverity": "CRITICAL",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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            "CSAFPID-0008"
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      "title": "Unauthenticated Local File Inclusion in php module"
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        "id": "CWE-434",
        "name": "Unrestricted Upload of File with Dangerous Type"
      },
      "notes": [
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          "group_ids": [
            "CSAFGID-0001"
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 8.8,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 8.8,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008"
          ]
        }
      ],
      "title": "Possible arbitrary file upload"
    },
    {
      "cve": "CVE-2025-41736",
      "cwe": {
        "id": "CWE-35",
        "name": "Path Traversal: \u0027.../...//\u0027"
      },
      "notes": [
        {
          "category": "description",
          "text": "A low privileged remote attacker can upload a new or overwrite an existing python script by using a path traversal of the target filename in php resulting in a remote code execution. ",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-0010",
          "CSAFPID-0011"
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          "CSAFPID-0007",
          "CSAFPID-0008"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "METZ CONNECT has released a new SW-Version 2.2.0. Install version 2.2.0 or later to remediate this vulnerability. Schedule the update at your next maintenance window. No workaround offers equivalent protection.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 8.8,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 8.8,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008"
          ]
        }
      ],
      "title": "Possible arbitrary code execution"
    },
    {
      "cve": "CVE-2025-41737",
      "cwe": {
        "id": "CWE-284",
        "name": "Improper Access Control"
      },
      "notes": [
        {
          "category": "description",
          "text": "Due to webserver misconfiguration an unauthenticated remote attacker is able to read the source of php modules. ",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-0009",
          "CSAFPID-0010",
          "CSAFPID-0011"
        ],
        "known_affected": [
          "CSAFPID-0006",
          "CSAFPID-0007",
          "CSAFPID-0008"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "METZ CONNECT has released a new SW-Version 2.2.0. Install version 2.2.0 or later to remediate this vulnerability. Schedule the update at your next maintenance window. No workaround offers equivalent protection.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 7.5,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008"
          ]
        }
      ],
      "title": "Improper access control via php endpoint "
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.