ABB FLXeon Controllers

View CSAF

1. EXECUTIVE SUMMARY CVSS v4 8.7 ATTENTION: Exploitable remotely/low attack complexity Vendor: ABB Equipment: FBXi, FBVi, FBTi, CBXi Vulnerabilities: Use of Hard-coded Credentials, Improper Validation of Specified Type of Input, Use of a One-Way Hash without a Salt
2. RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to take remote control of the product, insert and run arbitrary code, and crash the device being accessed.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following ABB FLXeon products are affected: FBXi-8R8-X96 (2CQG201028R1011): Versions 9.3.5 and prior FBXi-8R8-H-X96 (2CQG201029R1011): Versions 9.3.5 and prior FBXi-X256 (2CQG201014R1021): Versions 9.3.5 and prior FBXi-X48 (2CQG201018R1021): Versions 9.3.5 and prior FBXi-8R8-X96-S (2CQG201606R1011): Versions 9.3.5 and prior FBVi-2U4-4T (2CQG201015R1021 ): Versions 9.3.5 and prior FBVi-2U4-4T-IMP (2CQG201016R1021): Versions 9.3.5 and prior FBVi-2U4-4T-SI: Versions 9.3.5 and prior FBTi-7T7-1U1R (2CQG201022R1011): Versions 9.3.5 and prior FBTi-6T1-1U1R (2CQG201022R1011): Versions 9.3.5 and prior CBXi-8R8 (2CQG201001R1021): Versions 9.3.5 and prior CBXi-8R8-H (2CQG201001R1021): Versions 9.3.5 and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798 Credentials that are required for the functioning of the product cannot be stored in a HW supported secure storage as the product does not implement such a component. CVE-2024-48842 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.0 has been calculated; the CVSS vector string is (AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2024-48842. A base score of 7.3 has been calculated; the CVSS vector string is (AV:P/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H). 3.2.2 IMPROPER VALIDATION OF SPECIFIED TYPE OF INPUT CWE-1287 A remote code execution is possible due to an improper input validation. CVE-2024-48851 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2024-48851. A base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.2.3 USE OF A ONE-WAY HASH WITHOUT A SALT CWE-759 Password hashes are stored using a vulnerable MD5 algorithm with low entropy on salt, stored in plain text on unencrypted partitions. CVE-2025-10205 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.8 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-10205. A base score of 8.7 has been calculated; the CVSS vector string is (AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.2.4 IMPROPER VALIDATION OF SPECIFIED TYPE OF INPUT CWE-1287 Users can push files with full pathnames allowing file operations in off limits directories. CVE-2025-10207 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.2 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H). A CVSS v4 score has also been calculated for CVE-2025-10207. A base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: Switzerland 3.4 RESEARCHER Gjoko Krstikj of Zero Science Lab reported these vulnerabilities to ABB.
4. MITIGATIONS ABB recommends users do the following actions on any released SW version of FLXeon: Stop and disconnect any FLXeon products that are exposed directly to the Internet, either via a direct ISP connection or via NAT port forwarding. Ensure that physical controls are in place, so no unauthorized personnel can access your devices, components, peripheral equipment, and networks. Ensure that all FLXeon products are upgraded to the latest firmware version. The latest version of FLXeon firmware can be found on the respective product homepage. When remote access is required, only use secure methods. If a Virtual Private Network (VPN) is used, ensure that the chosen VPN is secure i.e. updated to the most current version available and configured for secure access. For more information refer to ABB’s Cybersecurity Advisory 9AKK108471A7121. The ABB advisory includes a detailed mapping of applicable mitigations for each listed vulnerability. CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as: Locate control system networks and remote devices behind firewalls and isolating them from business networks. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. 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. 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/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.
5. UPDATE HISTORY November 6, 2025: Initial Publication