{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "The vulnerability enables unauthorized access to the Reboot OS function within the Remote Transport Service, allowing an attacker to trigger a system reboot without the required authentication. This functionality initiates a system reboot on the target machine. However, remote exploitation of this vulnerability is not feasible unless the attacker has already gained access to the network where the affected ABB Ability\u2122 zenon system is deployed.\n\nAt the time of writing, there is no evidence that this vulnerability is being actively exploited in the wild.\n",
        "title": "Summary"
      },
      {
        "category": "other",
        "text": "- ABB recommends installing only the Service Engine component on production systems and installing the Engineering Studio on a separate dedicated Engineering station. Physical, local access to systems with the ABB AbilityTM zenon Software Platform should be restricted to authorized users only in an environment with physical access control measures in place.\n\n- ABB recommends that system integrators and asset owners conduct their own risk assessments to determine appropriate mitigation strategies. \n\n- ABB recommends keeping the operating system and software up to date\n",
        "title": "General security recommendations"
      },
      {
        "category": "other",
        "text": "For additional instructions and support please contact your local ABB service organization. For contact information, see www.abb.com/contactcenters.\n\nInformation about ABB\u2019s cyber security program and capabilities can be found at www.abb.com/cybersecurity.\n",
        "title": "Support"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information in this document is subject to change without notice, and should not be construed as a commitment by ABB.\n\nABB provides no warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, for the information contained in this document, and assumes no responsibility for any errors that may appear in this document. In no event shall ABB or any of its suppliers be liable for direct, indirect, special, incidental or consequential damages of any nature or kind arising from the use of this document, or from the use of any hard-ware or software described in this document, even if ABB or its suppliers have been advised of the possibility of such damages.\n\nThis document and parts hereof must not be reproduced or copied without written permission from ABB, and the contents hereof must not be imparted to a third party nor used for any unauthorized purpose.\n\nAll rights to registrations and trademarks reside with their respective owners.\n",
        "title": "Notice"
      },
      {
        "category": "other",
        "text": "ABB has a rigorous internal cyber security continuous improvement process which involves regular testing with industry leading tools and periodic assessments to identify potential product issues. Occasionally an issue is determined to be a design or coding flaw with implications that may impact product cyber security.\n\nWhen a potential product vulnerability is identified or reported, ABB immediately initiates our vulnerability handling process. This entails validating if the issue is in fact a product issue, identifying root causes, determining what related products may be impacted, developing a remediation, and notifying end users and governmental organizations.\n\nThe resulting Cyber Security Advisory intends to notify customers of the vulnerability and provide details on which products are impacted, how to mitigate the vulnerability or explain workarounds that minimize the potential risk as much as possible. The release of a Cyber Security Advisory should not be misconstrued as an affirmation or indication of an active threat or ongoing campaign targeting the products mentioned here. If ABB is aware of any specific threats, it will be clearly mentioned in the communication.\n\nThe publication of this Cyber Security Advisory is an example of ABB\u2019s commitment to the user community in support of this critical topic. Responsible disclosure is an important element in the chain of trust we work to maintain with our many customers. The release of an Advisory provides timely information which is essential to help ensure our customers are fully informed.\n",
        "title": "Purpose"
      },
      {
        "category": "faq",
        "text": "What causes this vulnerability?\n- The vulnerability is caused by the lack of authentication checks, allowing unauthorized users on the network to execute privileged operations like rebooting the OS remotely.  \n\nWhat is ABB AbilityTM zenon Remote Transport Service?\n- It is a network-accessible feature of ABB AbilityTM zenon platform that enables remote deployment of ABB zenon projects, such as transferring project files and restarting runtimes without requiring physical access to the target devices.\n\nWhat might an attacker use the vulnerability to do?\n- An attacker who successfully exploited this vulnerability could use the Reboot OS functionality of the Remote Transport Service without proper authentication. This Reboot OS functionality prompts a reboot of the target machine.\n\nHow could an attacker exploit this vulnerability?\n- An attacker could try to exploit this vulnerability by gaining network access to a system running the ABB zenon Service Engine, identifying the Remote Transport Service endpoint, and sending unauthenticated commands, such as rebooting the OS as the attacker can bypass the authentication mechanism resulting in unauthorized remote reboot.\n\nCould this vulnerability be exploited remotely? \n- Yes, this vulnerability could be exploited remotely, provided that the attacker has first gained access to the network where the target ABB AbilityTM zenon machine resides.\n\nCan functional safety be affected by an exploit of this vulnerability?\n- If ABB AbilityTM zenon is used in safety-critical operations, an attacker exploiting this vulnerability could remotely disrupt or alter runtime behavior, by rebooting the OS, thereby affecting functional safety.\n\nWhat does the update do?\n- The update fixes the authentication bypass issue in the Remote Transport Service, ensuring that unauthorized users can no longer trigger the Reboot OS function without proper authentication.\n\nWhen this security advisory was issued, had this vulnerability been publicly disclosed?\n- Yes, this vulnerability has been publicly disclosed.\n\nWhen this security advisory was issued, had ABB received any reports that this vulnerability was being exploited?\n- No, ABB had not received any information indicating that this vulnerability had been exploited when this security advisory was originally issued.\n\n",
        "title": "Frequently asked questions"
      }
    ],
    "publisher": {
      "category": "vendor",
      "name": "ABB PSIRT",
      "namespace": "https://www.abb.com/global/en/company/about/cybersecurity/alerts-and-notifications"
    },
    "references": [
      {
        "category": "self",
        "summary": "ABB CYBERSECURITY ADVISORY - PDF version ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=2NGA002743\u0026LanguageCode=en\u0026DocumentPartId=pdf\u0026Action=Launch"
      },
      {
        "category": "self",
        "summary": "ABB CYBERSECURITY ADVISORY - CSAF version ",
        "url": "https://psirt.abb.com/csaf/2026/2nga002743.json"
      }
    ],
    "title": "ABB AbilityTM zenon Remote Transport Vulnerability",
    "tracking": {
      "current_release_date": "2026-07-06T00:30:00.000Z",
      "generator": {
        "date": "2026-07-06T09:04:36.640Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.6.5"
        }
      },
      "id": "2NGA002743",
      "initial_release_date": "2025-08-12T00:30:00.000Z",
      "revision_history": [
        {
          "date": "2025-08-12T00:30:00.000Z",
          "legacy_version": "A",
          "number": "1",
          "summary": "Initial version."
        },
        {
          "date": "2026-07-06T00:30:00.000Z",
          "number": "2",
          "summary": "Updated the document with the vulnerability fix information"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003e=7.50|\u003c11 build 400376",
                "product": {
                  "name": "ABB Ability\u2122 Zenon \u003e=7.50|\u003c=11",
                  "product_id": "AV1"
                }
              },
              {
                "category": "product_version",
                "name": "11 build 400376",
                "product": {
                  "name": "ABB Ability\u2122 Zenon 11 build 400376",
                  "product_id": "FX1"
                }
              },
              {
                "category": "product_version",
                "name": "12 build 407620",
                "product": {
                  "name": "ABB Ability\u2122 Zenon 12 build 407620",
                  "product_id": "FX2"
                }
              },
              {
                "category": "product_version",
                "name": "14 build 405141",
                "product": {
                  "name": "ABB Ability\u2122 Zenon 14 build 405141",
                  "product_id": "FX3"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003e=12|\u003c12 build 407620 ",
                "product": {
                  "name": "ABB Ability\u2122 Zenon \u003e=12|\u003c12 build 407620 ",
                  "product_id": "AV2"
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003e=14|\u003c14 build 405141",
                "product": {
                  "name": "ABB Ability\u2122 Zenon \u003e=14|\u003c14 build 405141",
                  "product_id": "AV3"
                }
              }
            ],
            "category": "product_name",
            "name": "Ability\u2122 Zenon"
          }
        ],
        "category": "vendor",
        "name": "ABB"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-8754",
      "cwe": {
        "id": "CWE-306",
        "name": "Missing Authentication for Critical Function"
      },
      "notes": [
        {
          "category": "description",
          "text": "In the default configuration of the ABB zenon software platform, the zensyssrv.exe service is set to start automatically. To utilize the Remote Transport Service, users are required to configure a password beforehand. However, a security vulnerability has been identified that enables unauthorized attackers to bypass authentication mechanisms and remotely initiate a system reboot without proper authorization",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "fixed": [
          "FX1",
          "FX2",
          "FX3"
        ],
        "known_affected": [
          "AV1",
          "AV2",
          "AV3"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "NVD -CVE-2025-8754",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-8754"
        }
      ],
      "remediations": [
        {
          "category": "workaround",
          "details": "- Restrict network access to systems with the ABB zenon Software Platform installed. \n  - Ensure that access to a system is restricted by implementing access controls to minimize the risk of unauthorized access.\n\n- Assess the necessity of the ABB zenon Remote Transport functionality.\n  - Ensure that if the Remote Transport functionality is not used, the zensyssrv.exe (ABB zenon System Service) is stopped or terminated. The zensyssrv.exe can also be stopped or terminated after authorized use to prevent this vulnerability.\n",
          "product_ids": [
            "AV1",
            "AV2",
            "AV3"
          ]
        },
        {
          "category": "mitigation",
          "details": "Refer to section \u201cGeneral security recommendations\u201d for further advise on how to keep your system secure.",
          "product_ids": [
            "AV1",
            "AV2",
            "AV3"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "The issue has been corrected in the following ABB Ability\u2122 zenon product versions: Version 11 build 400376, Version 12 build 407620 and Version 14 build 405141, where the respective patches have been successfully released. ABB recommends that customers upgrade to these patched versions at the earliest convenience. \n\nThe updated versions are available through the zenon Update Manager (Versions 12 and 14). For Version 11, please contact zenon.support@abb.com.\n",
          "product_ids": [
            "AV1",
            "AV2",
            "AV3"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "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:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AV1",
            "AV2",
            "AV3"
          ]
        }
      ],
      "title": "CVE-2025-8754"
    }
  ]
}