critical severity August 25, 2026 · 1 min read

CISA ICS Advisory: FURUNO FA-50 Class B AIS Transponder

Here’s what this advisory affects, and what to do about it.

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/*

CISA ICS Advisory: FURUNO FA-50 Class B AIS Transponder

CISA has published an ICS advisory on August 25, 2026, warning that all versions of the FURUNO FA-50 Class B AIS Transponder contain vulnerabilities that could allow an attacker to alter device settings.

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Remote alteration of AIS transponder settings

The advisory states that successful exploitation of the vulnerabilities could allow an attacker to alter device settings. It does not say whether the flaws have been exploited in the wild.

Affected products

The advisory names a single product family: FURUNO FA-50 Class B AIS Transponder. It states that all versions (vers:all/*) are affected. No additional products or specific version numbers are listed.

What to do

Determine whether any FURUNO FA-50 units are present in your maritime or operational technology environment.
Consult the vendor’s guidance for available firmware updates or mitigations.
Apply any patches or configuration changes released by FURUNO for the FA-50 as soon as they become available.
Monitor the vendor’s official support channel and CISA’s ICS advisory page for further updates.
Review network segmentation and access controls for AIS-related systems to limit exposure where feasible.

Operators of vessels and maritime infrastructure using the FURUNO FA-50 should treat the advisory as an indication that the device may require attention in the near term.

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value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

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verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

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Sources: CISA ICS Advisory

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