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FURUNO FA-50 Class B AIS Transponder

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CVEVulnerabilityCritical

Overview

FURUNO Electric has issued a warning regarding vulnerabilities in its FA-50 Class B AIS Transponder, affecting all versions of the device. These vulnerabilities could allow an attacker with knowledge of hard-coded credentials to alter critical device settings. Notably, the product has not received updates since production ended in October 2020, leaving users at risk. FURUNO advises against connecting the device directly to the internet and recommends securing the vessel to prevent unauthorized access. The vulnerabilities have been documented as CVE-2026-59769 and CVE-2026-67578, with a CVSS score of up to 9.1, indicating a critical level of severity. Users of this device need to take immediate action to mitigate potential exploitation.

Key Takeaways

  • Affected Systems: FURUNO FA-50 Class B AIS Transponder, all versions; Vendor: FURUNO Electric Co., Ltd.
  • Action Required: FURUNO recommends that users do not connect the product directly to the internet.
  • Timeline: Disclosed on August 25, 2026

Original Article Summary

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to alter device settings. The following versions of FURUNO FA-50 Class B AIS Transponder are affected: FURUNO FA-50 Class B AIS Transponder vers:all/* CVSS Vendor Equipment Vulnerabilities v3 9.1 FURUNO ELECTRIC CO.,LTD. FURUNO FA-50 Class B AIS Transponder Use of Hard-coded Credentials, Missing Authentication for Critical Function Background Critical Infrastructure Sectors: Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: Japan Vulnerabilities Expand All + CVE-2026-59769 An attacker, who knows the credentials and has access to the in-vessel network to which the device is connected to, may operate the settings screen using that credentials to alter the settings of the device. View CVE Details Affected Products FURUNO FA-50 Class B AIS Transponder Vendor: FURUNO ELECTRIC CO.,LTD. Product Version: FURUNO FA-50 Class B AIS Transponder: vers:all/* Product Status: known_affected Remediations Mitigation FURUNO ELECTRIC CO.,LTD. notes that production of this product ended in October 2020, and software updates will no longer be provided. FURUNO recommends users do not connect the product directly to the internet. To prevent unauthorized access, the vessel on which the product is installed should be properly locked and managed. Relevant CWE: CWE-798 Use of Hard-coded Credentials Metrics CVSS Version Base Score Base Severity Vector String 3.1 9.1 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H 4.0 8.8 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N CVE-2026-67578 Some configurations may be changed on the management screen without authentication. View CVE Details Affected Products FURUNO FA-50 Class B AIS Transponder Vendor: FURUNO ELECTRIC CO.,LTD. Product Version: FURUNO FA-50 Class B AIS Transponder: vers:all/* Product Status: known_affected Remediations Mitigation FURUNO ELECTRIC CO.,LTD. notes that production of this product ended in October 2020, and software updates will no longer be provided. FURUNO recommends users do not connect the product directly to the internet. To prevent unauthorized access, the vessel on which the product is installed should be properly locked and managed. Relevant CWE: CWE-306 Missing Authentication for Critical Function Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N 4.0 8.7 HIGH CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N Acknowledgments Souvik Kandar reported these vulnerabilities to CISA JPCERT/CC coordinated with Furuno Electric and CISA 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). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. 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 current version available. Also recognize VPN is only as secure as the connected devices. 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. No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. Revision History Initial Release Date: 2026-08-25 Date Revision Summary 2026-08-25 1 Initial Publication Legal Notice and Terms of Use

Impact

FURUNO FA-50 Class B AIS Transponder, all versions; Vendor: FURUNO Electric Co., Ltd.

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Disclosed on August 25, 2026

Remediation

FURUNO recommends that users do not connect the product directly to the internet. Additionally, vessels should be properly locked and managed to prevent unauthorized access. No software updates or patches will be provided as production ended in October 2020.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Vulnerability, Critical.

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