{
  "document": {
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "© Copyright 2026 ABB. All rights reserved.",
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "An update is available that resolves the publicly reported vulnerabilities in the PHP and OpenSSL components in the product versions listed as affected in the advisory. An attacker who successfully exploited this vulnerability could insert and run arbitrary code. An attacker who successfully exploited the OpenSSL vulnerability (CVE-2026-35189) could cause a denial of service of the affected products.",
        "title": "Summary"
      },
      {
        "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’s cyber security program and capabilities can be found at www.abb.com/cybersecurity.",
        "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 hardware 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.",
        "title": "Notice"
      },
      {
        "category": "other",
        "text": "For any installation of software-related ABB products we strongly recommend the following (non-exhaustive) list of cyber security practices:\n\n- Isolate special purpose networks (e.g. for automation systems) and remote devices behind firewalls and separate them from any general-purpose network (e.g. office or home networks).\n- Install physical controls so no unauthorized personnel can access your devices, components, peripheral equipment, and networks.\n- Never connect programming software or computers containing programming software to any network other than the network for the devices that it is intended for.\n- Scan all data imported into your environment before use to detect potential malware infections.\n- Minimize network exposure for all applications and endpoints to ensure that they are not accessible from the Internet unless they are designed for such exposure and the intended use requires such.\n- Ensure all nodes are always up to date in terms of installed software, operating system, and firmware patches as well as anti-virus and firewall.\n- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices.",
        "title": "General security recommendations"
      },
      {
        "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’s 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.",
        "title": "Purpose"
      },
      {
        "category": "faq",
        "text": "What causes the vulnerability?\n- The PHP vulnerabilities are caused by improper handling of out-of-memory errors and of internal request state (use-after-free) in the PHP scripting engine used by the web server of the ACF5000 LCS/CCUS. The OpenSSL vulnerability is caused by excessive memory allocation when OpenSSL processes the CRL Distribution Points extension of a certificate.\n\nWhat is ACF5000 LCS/CCUS?\n- ACF5000 is a multi-component, continuous gas analyzer system based on FTIR-Measurement technology. It is widely used for emission monitoring and process control in various applications. ACF5000 is available in multiple product versions:\n   - ACF5000\n   - ACF5000 LCS\n   - ACF5000 CCUS\n\n   ACF5000 LCS and ACF5000 CCUS are enhanced versions of the ACF5000. They differ both in core hardware and software components compared to ACF5000.\n\nWhat is PHP?\n- PHP is a general-purpose scripting language. In the ACF5000 LCS/CCUS, a web server runs the PHP engine to serve the pages of the web interface.\n\nWhat is OpenSSL?\n- OpenSSL is a widely used software library that implements the TLS protocol and X.509 certificate handling. In the ACF5000 LCS/CCUS, the mutual TLS server (TCP port 9001) uses OpenSSL to establish TLS connections with client certificates.\n\nWhat might an attacker use the vulnerability to do?\n- An attacker who successfully exploited the PHP vulnerabilities could insert and run arbitrary code on the affected system node with the privileges of the web server account. This could allow the attacker to read or change data accessible to the web server and to stop the web service. An attacker who successfully exploited the OpenSSL vulnerability could exhaust the memory of the system node and thereby cause a denial of service.\n\nHow could an attacker exploit the vulnerability?\n- An attacker could try to exploit the PHP vulnerabilities by sending specially crafted web requests, and the OpenSSL vulnerability by sending a specially crafted certificate to the mutual TLS server (TCP port 9001), to an affected system node. This would require that the attacker has access to the system network, by connecting to the network either directly or through a wrongly configured or penetrated firewall, or that he installs malicious software on a system node or otherwise infects the network with malicious software. Recommended practices help mitigate such attacks, see section Mitigating Factors above.\n\nCould the vulnerability be exploited remotely?\n- Yes, an attacker who has network access to an affected system node could exploit these vulnerabilities. Recommended practices include that process control systems are physically protected, have no direct connections to the Internet, and are separated from other networks by means of a firewall system that has a minimal number of ports exposed.\n\nWhat can be effects of an exploit of this vulnerability?\n- ACF5000 LCS/CCUS is a continuous gas analyzer system. An exploited vulnerability can result in falsified measuring data and/or status information or complete system outage.\n\nIs ACF5000 affected as well?\n- No, only ACF5000 LCS and ACF5000 CCUS are affected by the vulnerabilities indicated within this document.\n\nIs the optional feature “Remote Assistance” or “Remote Condition Monitoring” affected?\n- No, only ACF5000 LCS and ACF5000 CCUS are affected by the vulnerabilities indicated within this document. The industrial PC based solutions “ABB Ability remote assistance” and “ABB Ability remote condition monitoring” are not affected. Nevertheless, ABB recommends using strict network segmentation and use of correctly configured firewalls.\n\nDoes the ACF5000 LCS/CCUS still function if the network connection is physically disconnected?\n- The analyzer system ACF5000 LCS/CCUS can operate without network connection. However, all data transmission via ethernet will be interrupted. Remote Assistance, Remote Condition Monitoring and the Remote HMI service will be disrupted. Commissioning, Maintenance, and tasks requiring operating the webserver on the ACF5000 LCS/CCUS are still possible using the internal ethernet service port (X8) with physical access to the ACF5000 LCS/CCUS.\n\nWhat does the update do?\n- The update removes the vulnerabilities by replacing the affected PHP version with a newer PHP version (8.3.36 or later), in which the handling of out-of-memory errors and the cleanup of request state are fixed, and by replacing the affected OpenSSL version with a newer OpenSSL version, in which the processing of the CRL Distribution Points extension is deferred until it is needed.\n\nWhen this security advisory was issued, had this vulnerability been publicly disclosed?\n- Yes, these vulnerabilities have been publicly disclosed (PHP security release and Wiz Research publication, 2026-10-21; OpenSSL Security Advisory, 2026-09-29).\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 these vulnerabilities had been exploited when this security advisory was originally issued.",
        "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=3KXG141033R4801&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "category": "self",
        "summary": "ABB CYBERSECURITY ADVISORY - CSAF Version ",
        "url": "https://psirt.abb.com/csaf/2026/3kxg141033r4801.json"
      },
      {
        "summary": "SMT for ACF5000 software ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=SW%2FACF5000_LCS-CCUS%2FAO_SMT_5_6&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "SMT user manual ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=UM%2FSMT&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "AO-HMI for ACF5000 ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=SW%2FACF5000_LCS-CCUS%2FAO_HMI_P5_6&LanguageCode=en&DocumentPartId=&Action=Launch"
      }
    ],
    "title": "ACF5000 LCS/CCUS PHP2Shell and OpenSSL Vulnerabilities",
    "tracking": {
      "current_release_date": "2026-11-12T00:30:00.000Z",
      "generator": {
        "date": "2026-11-12T14:13:32.834Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.6.19"
        }
      },
      "id": "3KXG141033R4801",
      "initial_release_date": "2026-11-12T00:30:00.000Z",
      "revision_history": [
        {
          "date": "2026-11-12T00:30:00.000Z",
          "legacy_version": "A",
          "number": "1",
          "summary": "Initial version."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "5.6.0",
                "product": {
                  "name": "ABB ACF5000 LCS 5.6.0",
                  "product_id": "AV1"
                }
              },
              {
                "category": "product_version",
                "name": "5.6.2",
                "product": {
                  "name": "ABB ACF5000 LCS 5.6.2",
                  "product_id": "FX1"
                }
              }
            ],
            "category": "product_name",
            "name": "ACF5000 LCS"
          },
          {
            "branches": [
              {
                "category": "product_version",
                "name": "5.6.0",
                "product": {
                  "name": "ABB ACF5000 CCUS 5.6.0",
                  "product_id": "AV2"
                }
              },
              {
                "category": "product_version",
                "name": "5.6.2",
                "product": {
                  "name": "ABB ACF5000 CCUS 5.6.2",
                  "product_id": "FX2"
                }
              }
            ],
            "category": "product_name",
            "name": "ACF5000 CCUS"
          }
        ],
        "category": "vendor",
        "name": "ABB"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-109618",
      "cwe": {
        "id": "CWE-1325",
        "name": "Improperly Controlled Sequential Memory Allocation"
      },
      "notes": [
        {
          "category": "description",
          "text": "PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "fixed": [
          "FX1",
          "FX2"
        ],
        "known_affected": [
          "AV1",
          "AV2"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "NVD - CVE-2026-109618",
          "url": "https://nvd.nist.gov/vuln/detail/cve-2026-109618"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "The vulnerabilities are fixed with the following product version: 5.6.2.\n\nABB recommends that customers apply the update at earliest convenience.\n\nPhysical access to the ACF5000 LCS/CCUS for the update procedure is strongly recommended. The ACF5000 LCS will re-boot during the update procedure and the gas measurement will be interrupted. ABB advises not to perform the update if\n- the ACF5000 LCS/CCUS is performing critical measurements, and the interruption of the measurement is not acceptable.\n- the customer does not feel confident in performing the update themselves.\n\nUpdate procedure:\n1. Download the latest version of the SMT for ACF5000 software using the ABB Library. Please refer to the reference section for the download link (SMT for ACF5000 software).\n2. Run SMT and connect the ACF5000 LCS/CCUS via Ethernet cable to the computer running SMT.\n3. Follow the steps outlined in the SMT user manual. ABB recommends performing the update step-by-step (Save configuration data, Load new software, Load configuration data). Please refer to the reference section for the download link (SMT user manual).\n4. Verify that all connections to DCS and/or Data Acquisition Handling systems are established and correct.\n5. In case the remote connection (AO-HMI for ACF5000) was used, it needs to be updated to match the ACF5000 LCS/CCUS software version. Please refer to the reference section for the download link (AO-HMI for ACF5000).\n\nIn case an update is not possible or the customer prefers the update to be performed by a service technician, ABB strongly recommends setting the web server of the ACF5000 LCS/CCUS to be available on interface “X8” only, as described in section “Workarounds”.\n\nThe ACF5000 LCS/CCUS is designed to be operated in an isolated network segment as described in section “Mitigating factors”.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "workaround",
          "details": "In case updating the ACF5000 LCS/CCUS to version 5.6.2 as described in “Recommended immediate actions” is not possible, ABB recommends setting the web server of the ACF5000 LCS/CCUS to be available on interface X8 only. This disables the web server on the external TCP/IP port (X9) and allows connections only through the TCP/IP port (X8) inside the cabinet. On the display of the device, select <MENU>, “Configure”, “System”, “Network”, “TCP/IP Network”, then the parameter “Web server available on:” and set it to “HTTPS - X8” (or “HTTP - X8” if the web server is operated with HTTP).\n\nImpact of workaround: the web interface can no longer be reached through the external TCP/IP port (X9). It can only be accessed through the TCP/IP port (X8) inside the cabinet.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "mitigation",
          "details": "For PHP2Shell vulnerabilities (CVE-2026-109618, CVE-2026-109619), an attack requires network access to the web server of the ACF5000 LCS/CCUS (TCP ports 80 and 443). No user authentication is needed. The reliability of an exploit depends on the specific PHP build, the enabled extensions and the memory layout of the target, which is why the attack complexity is rated High in the CVSS v4.0 assessment (and in the CVSS v3.1 assessment of CVE-2026-109619).\n\nABB recommends operating the ACF5000 LCS/CCUS in an isolated network segment behind a firewall, without a direct connection to the Internet, and allowing access to the web interface (TCP ports 80 and 443) and to the mutual TLS server (TCP port 9001) only from trusted hosts.\n\nRefer to section “General security recommendations” for further advice on how to keep your system secure.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 9.8,
            "environmentalSeverity": "CRITICAL",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 9.8,
            "temporalSeverity": "CRITICAL",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "title": "CVE-2026-109618"
    },
    {
      "cve": "CVE-2026-109619",
      "cwe": {
        "id": "CWE-1325",
        "name": "Improperly Controlled Sequential Memory Allocation"
      },
      "notes": [
        {
          "category": "description",
          "text": "PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The global state may then refer to request memory even after it has been freed. Subsequent requests may read or branch on this stale state before it is fully initialized. Multiple strategies can trigger this condition and produce remote code execution (RCE).",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "fixed": [
          "FX1",
          "FX2"
        ],
        "known_affected": [
          "AV1",
          "AV2"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "NVD - CVE-2026-109619",
          "url": "https://nvd.nist.gov/vuln/detail/cve-2026-109619"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "The vulnerabilities are fixed with the following product version: 5.6.2.\n\nABB recommends that customers apply the update at earliest convenience.\n\nPhysical access to the ACF5000 LCS/CCUS for the update procedure is strongly recommended. The ACF5000 LCS will re-boot during the update procedure and the gas measurement will be interrupted. ABB advises not to perform the update if\n- the ACF5000 LCS/CCUS is performing critical measurements, and the interruption of the measurement is not acceptable.\n- the customer does not feel confident in performing the update themselves.\n\nUpdate procedure:\n1. Download the latest version of the SMT for ACF5000 software using the ABB Library. Please refer to the reference section for the download link (SMT for ACF5000 software).\n2. Run SMT and connect the ACF5000 LCS/CCUS via Ethernet cable to the computer running SMT.\n3. Follow the steps outlined in the SMT user manual. ABB recommends performing the update step-by-step (Save configuration data, Load new software, Load configuration data). Please refer to the reference section for the download link (SMT user manual).\n4. Verify that all connections to DCS and/or Data Acquisition Handling systems are established and correct.\n5. In case the remote connection (AO-HMI for ACF5000) was used, it needs to be updated to match the ACF5000 LCS/CCUS software version. Please refer to the reference section for the download link (AO-HMI for ACF5000).\n\nIn case an update is not possible or the customer prefers the update to be performed by a service technician, ABB strongly recommends setting the web server of the ACF5000 LCS/CCUS to be available on interface “X8” only, as described in section “Workarounds”.\n\nThe ACF5000 LCS/CCUS is designed to be operated in an isolated network segment as described in section “Mitigating factors”.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "workaround",
          "details": "In case updating the ACF5000 LCS/CCUS to version 5.6.2 as described in “Recommended immediate actions” is not possible, ABB recommends setting the web server of the ACF5000 LCS/CCUS to be available on interface X8 only. This disables the web server on the external TCP/IP port (X9) and allows connections only through the TCP/IP port (X8) inside the cabinet. On the display of the device, select <MENU>, “Configure”, “System”, “Network”, “TCP/IP Network”, then the parameter “Web server available on:” and set it to “HTTPS - X8” (or “HTTP - X8” if the web server is operated with HTTP).\n\nImpact of workaround: the web interface can no longer be reached through the external TCP/IP port (X9). It can only be accessed through the TCP/IP port (X8) inside the cabinet.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "mitigation",
          "details": "For PHP2Shell vulnerabilities (CVE-2026-109618, CVE-2026-109619), an attack requires network access to the web server of the ACF5000 LCS/CCUS (TCP ports 80 and 443). No user authentication is needed. The reliability of an exploit depends on the specific PHP build, the enabled extensions and the memory layout of the target, which is why the attack complexity is rated High in the CVSS v4.0 assessment (and in the CVSS v3.1 assessment of CVE-2026-109619).\n\nABB recommends operating the ACF5000 LCS/CCUS in an isolated network segment behind a firewall, without a direct connection to the Internet, and allowing access to the web interface (TCP ports 80 and 443) and to the mutual TLS server (TCP port 9001) only from trusted hosts.\n\nRefer to section “General security recommendations” for further advice on how to keep your system secure.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalScore": 8.1,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 8.1,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "title": "CVE-2026-109619"
    },
    {
      "cve": "CVE-2026-35189",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "notes": [
        {
          "category": "description",
          "text": "A certificate with many nameRelativeToCRLIssuer entries in its CRL Distribution Points extension causes disproportionate heap growth when OpenSSL caches the X.509 extensions. The mutual TLS server of the ACF5000 LCS/CCUS (mTlsServer, TCP port 9001) processes the peer certificate during the TLS handshake, before the client is authenticated. A crafted certificate of less than about 100 KiB can make the server allocate several hundred MiB of memory, and repeated connections can exhaust the memory of the device, causing a denial of service.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "fixed": [
          "FX1",
          "FX2"
        ],
        "known_affected": [
          "AV1",
          "AV2"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "NVD - CVE-2026-35189",
          "url": "https://nvd.nist.gov/vuln/detail/cve-2026-35189"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "The vulnerabilities are fixed with the following product version: 5.6.2.\n\nABB recommends that customers apply the update at earliest convenience.\n\nPhysical access to the ACF5000 LCS/CCUS for the update procedure is strongly recommended. The ACF5000 LCS will re-boot during the update procedure and the gas measurement will be interrupted. ABB advises not to perform the update if\n- the ACF5000 LCS/CCUS is performing critical measurements, and the interruption of the measurement is not acceptable.\n- the customer does not feel confident in performing the update themselves.\n\nUpdate procedure:\n1. Download the latest version of the SMT for ACF5000 software using the ABB Library. Please refer to the reference section for the download link (SMT for ACF5000 software).\n2. Run SMT and connect the ACF5000 LCS/CCUS via Ethernet cable to the computer running SMT.\n3. Follow the steps outlined in the SMT user manual. ABB recommends performing the update step-by-step (Save configuration data, Load new software, Load configuration data). Please refer to the reference section for the download link (SMT user manual).\n4. Verify that all connections to DCS and/or Data Acquisition Handling systems are established and correct.\n5. In case the remote connection (AO-HMI for ACF5000) was used, it needs to be updated to match the ACF5000 LCS/CCUS software version. Please refer to the reference section for the download link (AO-HMI for ACF5000).\n\nIn case an update is not possible or the customer prefers the update to be performed by a service technician, ABB strongly recommends setting the web server of the ACF5000 LCS/CCUS to be available on interface “X8” only, as described in section “Workarounds”.\n\nThe ACF5000 LCS/CCUS is designed to be operated in an isolated network segment as described in section “Mitigating factors”.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "workaround",
          "details": "For the OpenSSL vulnerability (CVE-2026-35189), ABB recommends implementing the network restrictions limiting access to the mutual TLS server (TCP port 9001) as described in section “Mitigating factors”.\n\nAlternatively, the network connection from the ACF5000 LCS/CCUS can be physically disconnected.\n\nImpact of workaround: No device data (including status information and measurement data) can be received via protocols such as Modbus TCP/IP. Remote connection and optional products (such as Remote Assistance and Remote Condition Monitoring) can no longer be used as intended.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        },
        {
          "category": "mitigation",
          "details": "For the OpenSSL vulnerability (CVE-2026-35189), an attack requires network access to the mutual TLS server of the ACF5000 LCS/CCUS (TCP port 9001). No user authentication is needed. The vulnerability affects availability only; there is no impact on the confidentiality or integrity of data.\n\nABB recommends operating the ACF5000 LCS/CCUS in an isolated network segment behind a firewall, without a direct connection to the Internet, and allowing access to the web interface (TCP ports 80 and 443) and to the mutual TLS server (TCP port 9001) only from trusted hosts.\n\nRefer to section “General security recommendations” for further advice on how to keep your system secure.",
          "product_ids": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "environmentalScore": 5.3,
            "environmentalSeverity": "MEDIUM",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 5.3,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "AV1",
            "AV2"
          ]
        }
      ],
      "title": "CVE-2026-35189"
    }
  ]
}