{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Maximilian Wolodin"
        ],
        "organization": "ABB",
        "summary": "for reporting this vulnerability through responsible disclosure."
      }
    ],
    "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": "ABB is aware of a vulnerability in the product versions listed as affected in the advisory. An update is available that resolves the reported vulnerability in the product versions under maintenance.\n\nAn attacker who successfully exploited this vulnerability could cause the product to stop or make the product inaccessible.\n",
        "title": "Summary"
      },
      {
        "category": "other",
        "text": "Control systems and the control network are exposed to cyber threats. In order to minimize these risks, the protective measures and best practices listed below are available in addition to other measures. ABB strongly recommends system integrators and asset owners to implement the measures they con-sider appropriate for their control system environment:\n\n- Place control systems in a dedicated control network containing control systems only.\n- Locate control networks and systems behind firewalls and separate them from any other networks like business networks and the internet.\n- Block any inbound internet traffic destined for the control networks/systems. Place remote access systems used for remote control system access outside the control network.\n- Limit outbound internet traffic originating from control systems/networks as much as possible. If control systems must talk to the internet, tailor firewall rules to required resources - allow only source IPs, destination IPs and services/destination ports which control systems definitely need to use for normal control operation.\n- If internet access is required on occasion only, disable relevant firewall rules and enable them during the time window of required internet access only. If supported by your firewall, define an expiry date and time for such rules – after the expiry date and time, the firewall will disable the rule automatically.\n- Limit exposure of control networks/systems to internal systems. Tailor firewall rules allowing traffic from internal systems to control networks/systems to allow only source IPs, destination IPs and services/destination ports which are definitely required for normal control operation.\n- Create strict firewall rules to filter malicious network traffic targeting control system vulnerabilities (\"exploit traffic\"). Exploit traffic may use network communication features like source routing, IP fragmentation and/or IP tunneling. If such features are not required for normal control operation, block them on your firewall.\n- If supported by your firewall, apply additional filters to traffic which provide protection for control networks/systems. Such filters are provided by advanced firewall features like Application Control and Anti-Virus.\n- Use Intrusion Detection Systems (IDS) or Intrusion Preventions Systems (IPS) to detect/block control system-specific exploit traffic. Consider using IPS rules protecting against control system exploits.\n- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs). Please ensure that VPN solutions are updated to the most current version available.\n- In case you want to filter internal control network traffic, consider using solutions supporting Intra LAN traffic control like VLAN access control lists.\n- Harden your control systems by enabling only the ports, services and software required for normal control operation. Disable all other ports and disable/uninstall all other services and software.\n- If possible, limit the permissions of user accounts, software processes and devices to the permissions required for normal control operation.\n- Use trusted, patched software and malware protection solutions. Interact with trusted web sites and trusted email attachments only.\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- Protect control systems from physical access by unauthorized personnel e.g. by placing them in locked switch cabinets.\n\nFor more information on recommended practices, please refer to the following documents listed in the reference section\n\n- 2PAA112641-111\tFreelance Hardening Manual\n- 3BSE032547\tSecurity for Industrial Automation and Control Systems\n- 2PAA122516\tABB Ability™ System 800xA, Symphony® Plus and Freelance System Hardening\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’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.\n",
        "title": "Notice"
      },
      {
        "category": "faq",
        "text": "What is the scope of the vulnerability?\n- An attacker who successfully exploited this vulnerability could remotely cause an affected controller to stop.\n\nWhat causes the vulnerability?\n- The vulnerability is caused by insufficient length check of input data.\n\nWhat is a Freelance controller?\n- A Freelance controller is the central unit of the Freelance DCS system for example PM 783F or PM 803F or PM 904F.\n\nWhat might an attacker use the vulnerability to do?\n- An attacker who successfully exploited this vulnerability could cause the affected controller to stop.\n\nHow could an attacker exploit the vulnerability?\n- An attacker could try to exploit the vulnerability by creating a specially crafted message and sending the message to an affected controller. 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 controller or otherwise infects the network with malicious software.\n\nCould the vulnerability be exploited remotely? \n- Yes, an attacker who has network access to an affected controller could exploit this vulnerability. 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 does the update do?\n- The update removes the vulnerability by correctly validating the input data.\n\nWhen this security advisory was issued, had this vulnerability been publicly disclosed?\n- No, ABB received information about this vulnerability through responsible disclosure.\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.",
        "title": "Frequently asked questions"
      },
      {
        "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 (e.g. ICS-CERT).\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"
      }
    ],
    "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=7PAA010706&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "category": "self",
        "summary": "ABB CYBERSECURITY ADVISORY - CSAF Version ",
        "url": "https://psirt.abb.com/csaf/2026/7paa010706.json"
      },
      {
        "summary": "3BDD012560-111 - Getting started ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=3BDD012560-111&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "2PAA124716-112 - Release Notes for Freelance 2019 SP1 FP1 system release ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=2PAA124716-112&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "2PAA112641-111 - Freelance Hardening Manual ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=2PAA112641-111&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "3BSE032547 - Security for Industrial Automation and Control Systems ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=3BSE032547&LanguageCode=en&DocumentPartId=&Action=Launch"
      },
      {
        "summary": "2PAA122516 - ABB Ability™ System 800xA, Symphony® Plus and Freelance System Hardening ",
        "url": "https://search.abb.com/library/Download.aspx?DocumentID=2PAA122516&LanguageCode=en&DocumentPartId=&Action=Launch"
      }
    ],
    "title": "Freelance Missing Length Check",
    "tracking": {
      "current_release_date": "2026-09-18T00:30:00.000Z",
      "generator": {
        "date": "2026-09-18T07:31:11.919Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.6.12"
        }
      },
      "id": "7PAA010706",
      "initial_release_date": "2026-09-18T00:30:00.000Z",
      "revision_history": [
        {
          "date": "2026-09-18T00:30:00.000Z",
          "number": "1",
          "summary": "Initial version. "
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
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                  "product_id": "SAV1"
                }
              },
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                "name": "Freelance 2013 SP1",
                "product": {
                  "name": "ABB System Version Freelance 2013 SP1",
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                }
              },
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                }
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        "relates_to_product_reference": "PAV2"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2019 SP1 RU03 installed with ABB Freelance Controller AC700",
          "product_id": "RFX6"
        },
        "product_reference": "SFX3",
        "relates_to_product_reference": "PAV2"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2013 SP1 RU06 installed with ABB Freelance Controller AC800",
          "product_id": "RFX7"
        },
        "product_reference": "SFX1",
        "relates_to_product_reference": "PAV3"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2016 SP1 RU07 installed with ABB Freelance Controller AC800",
          "product_id": "RFX8"
        },
        "product_reference": "SFX2",
        "relates_to_product_reference": "PAV3"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2019 SP1 RU03 installed with ABB Freelance Controller AC800",
          "product_id": "RFX9"
        },
        "product_reference": "SFX3",
        "relates_to_product_reference": "PAV3"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2013 SP1 RU06 installed with ABB Freelance Controller AC900",
          "product_id": "RFX10"
        },
        "product_reference": "SFX1",
        "relates_to_product_reference": "PAV4"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2016 SP1 RU07 installed with ABB Freelance Controller AC900",
          "product_id": "RFX11"
        },
        "product_reference": "SFX2",
        "relates_to_product_reference": "PAV4"
      },
      {
        "category": "installed_with",
        "full_product_name": {
          "name": "ABB System Version Freelance 2019 SP1 RU03 installed with ABB Freelance Controller AC900",
          "product_id": "RFX12"
        },
        "product_reference": "SFX3",
        "relates_to_product_reference": "PAV4"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2023-5778",
      "cwe": {
        "id": "CWE-130",
        "name": "Improper Handling of Length Parameter Inconsistency"
      },
      "notes": [
        {
          "category": "description",
          "text": "An attacker could exploit this vulnerability by sending a specially crafted message to the controller, causing the controller to stop.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "fixed": [
          "RFX1",
          "RFX2",
          "RFX3",
          "RFX4",
          "RFX5",
          "RFX6",
          "RFX7",
          "RFX8",
          "RFX9",
          "RFX10",
          "RFX11",
          "RFX12"
        ],
        "known_affected": [
          "RAV1",
          "RAV2",
          "RAV3",
          "RAV4",
          "RAV5",
          "RAV6",
          "RAV7",
          "RAV8",
          "RAV9",
          "RAV10",
          "RAV11",
          "RAV12",
          "RAV13",
          "RAV14",
          "RAV15",
          "RAV16",
          "RAV17",
          "RAV18",
          "RAV19",
          "RAV20",
          "RAV21",
          "RAV22",
          "RAV23",
          "RAV24"
        ],
        "known_not_affected": [
          "RNAV1",
          "RNAV2",
          "RNAV3",
          "RNAV4",
          "RNAV5",
          "RNAF6",
          "RNAV7",
          "RNAV8"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "NVD - CVE-2023-5778",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5778"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Refer to section “General security recommendations” for further advice on how to keep your system secure, as well checking the section “Workarounds”.",
          "product_ids": [
            "RAV1",
            "RAV2",
            "RAV3",
            "RAV4",
            "RAV5",
            "RAV6",
            "RAV7",
            "RAV8",
            "RAV9",
            "RAV10",
            "RAV11",
            "RAV12",
            "RAV13",
            "RAV14",
            "RAV15",
            "RAV16",
            "RAV17",
            "RAV18",
            "RAV19",
            "RAV20",
            "RAV21",
            "RAV22",
            "RAV23",
            "RAV24"
          ]
        },
        {
          "category": "workaround",
          "details": "For Freelance system version >= Freelance 2016 and Freelance controllers AC 700 and AC 900 (by using the Display Unit) there is the possibility to activate the Download-Protection (disabled Download) on the controller.\n\nDownload-Protection for the AC 700 Controller:\n\nUse the “Mounting_and_Installation_AC_700F_Controller” / “M&I - AC 700F Controller” (Englisch) or Montage_und_Installation_AC_700F_Controller” / “M&I - AC 700F Controller” (German) User Manual PDF. In the “8.3.2 Online functions” / “8.3.2 Online-Funktionen” section look for the desired action “Locking the AC 700F for application and firmware downloads” / “AC 700F für Applikations und Firm-ware-Download sperren”. When the locking is enabled the controller is not vulnerable any more against this know issue.\n\nDownload-Protection for the AC 900 Controller:\n\nUse the “Mounting_and_Installation_AC_700F_Controller” / “M&I - AC 700F Controller” (Englisch) or “Montage_und_Installation_AC_700F_Controller” / “M&I - AC 700F Controller” (German) User Manual PDF. In the “Section 8 - Service -> Online functions of the display unit -> Controller menu -> F2 - Security -> F2 function: Download  enabled/disabled” / “Kapitel 8 - Service -> Online-Funktionen der Display-Unit -> Controller-Menü -> F2 - Security -> Funktion F2: Download freigegeben/gesperrt” there is the Download-Protection described. When the Download is disabled the controller is not vulnerable any more against this know issue.\n",
          "product_ids": [
            "RAV1",
            "RAV2",
            "RAV3",
            "RAV4",
            "RAV5",
            "RAV6",
            "RAV7",
            "RAV8",
            "RAV9",
            "RAV10",
            "RAV11",
            "RAV12",
            "RAV13",
            "RAV14",
            "RAV15",
            "RAV16",
            "RAV17",
            "RAV18",
            "RAV19",
            "RAV20",
            "RAV21",
            "RAV22",
            "RAV23",
            "RAV24"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "The Freelance system shall be used as described in the manual 3BDD012560-111 “Getting Started” chapter 1.2.6.\n\nThe issue is corrected in following product versions:\n•\tFreelance 2013 SP1 RU06 and higher RUs for that version\n•\tFreelance 2016 SP1 RU07 and higher RUs for that version\n•\tFreelance 2019 SP1 RU03 and higher RUs for that version\n\nThis vulnerability is corrected in the product versions from Freelance 2019 SP1 FP1 on. This vulnerability does not exist with Freelance 2019 SP1 FP1 and later.\n\nABB recommends that customers apply the update at earliest convenience. Users who are unable to install the updates should immediately look to implement the Mitigation listed as this will block an attacker’s ability to compromise their installations.\n",
          "product_ids": [
            "RAV1",
            "RAV2",
            "RAV3",
            "RAV4",
            "RAV5",
            "RAV6",
            "RAV7",
            "RAV8",
            "RAV9",
            "RAV10",
            "RAV11",
            "RAV12",
            "RAV13",
            "RAV14",
            "RAV15",
            "RAV16",
            "RAV17",
            "RAV18",
            "RAV19",
            "RAV20",
            "RAV21",
            "RAV22",
            "RAV23",
            "RAV24"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "availabilityRequirement": "LOW",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "confidentialityRequirement": "LOW",
            "environmentalScore": 5.1,
            "environmentalSeverity": "MEDIUM",
            "exploitCodeMaturity": "FUNCTIONAL",
            "integrityImpact": "NONE",
            "integrityRequirement": "LOW",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "REASONABLE",
            "scope": "UNCHANGED",
            "temporalScore": 6.7,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:O/RC:R/CR:L/IR:L/AR:L",
            "version": "3.1"
          },
          "products": [
            "RAV1",
            "RAV2",
            "RAV3",
            "RAV4",
            "RAV5",
            "RAV6",
            "RAV7",
            "RAV8",
            "RAV9",
            "RAV10",
            "RAV11",
            "RAV12",
            "RAV13",
            "RAV14",
            "RAV15",
            "RAV16",
            "RAV17",
            "RAV18",
            "RAV19",
            "RAV20",
            "RAV21",
            "RAV22",
            "RAV23",
            "RAV24"
          ]
        }
      ],
      "title": "CVE-2023-5778"
    }
  ]
}