Maritime OT Cybersecurity Monitoring
Monitor CISA ICS security advisories affecting the vendors inside your vessel — from power management systems and ECDIS to propulsion controls and ballast automation. Support your IMO 2021 and IACS UR E26 vulnerability monitoring obligations with automated alerts filtered to your watchlist.
Why Maritime OT Security Is Different
Operational Constraints
Vessels cannot be patched at will. A patch that requires a reboot of a PMS or ECDIS mid-voyage is not an option — vulnerability management timelines are measured in port calls, not hours.
Remote Attack Surface
Modern vessels run VSAT internet for crew welfare, remote monitoring, and fuel optimisation. Every connected system is potentially reachable from shore. OT networks that were once air-gapped no longer are.
Regulatory Timeline
IMO Resolution MSC-FAL.1/Circ.3 required cyber risk management in ISM systems from January 2021. IACS UR E26 and E27 apply to newbuilds from July 2024. Compliance requires evidence of vulnerability monitoring.
Regulatory Compliance Context
Requires that cyber risks are addressed in ships' Safety Management Systems (SMS) by the first annual verification after 1 January 2021. This includes identifying critical OT systems, assessing vulnerabilities, and implementing detection and response measures. Vulnerability monitoring tools like OTWarden provide the evidence trail auditors expect.
IACS Unified Requirement E26 applies to ships contracted for construction on or after 1 July 2024. It requires owners to maintain an inventory of onboard OT/IT systems and ensure known vulnerabilities are identified and managed — directly addressed by OTWarden's watchlist alerts and asset inventory. IACS UR E27 is a separate requirement aimed at equipment manufacturers, not vessel operators.
Live Advisory Data — Maritime Vendors
Current advisory counts from CISA ICS-CERT and vendor feeds for the platform vendors found inside maritime OT systems. Data updates continuously.
Recent Critical & High Advisories
Why Kongsberg and Wärtsilä Have No CISA Advisories — And Why That's Not the Whole Story
Kongsberg Maritime and Wärtsilä handle security vulnerabilities through private customer channels rather than public advisory databases. CISA has never published an ICS-CERT advisory for either vendor — and they're not alone among maritime OT suppliers in operating this way. OTWarden monitors the NVD directly for any CVEs that do surface against their products, but these are rare.
The real attack surface on a vessel running K-Chief or UNIC isn't a "Kongsberg CVE" — it's the underlying infrastructure those systems are built on:
PMS and SCADA HMIs run Windows — often unpatched for months due to vendor qualification delays. Standard Microsoft CVEs apply.
Generator management, switchboard control, and propulsion PLCs in K-Chief and UNIC installations frequently use Siemens S7 hardware.
The communications protocols connecting sensors, actuators, and controllers have known DoS and authentication vulnerabilities.
Integrated vessel automation systems draw on multiple platform vendors — all of which publish advisories through CISA.
When CISA publishes an advisory for Siemens SIMATIC S7-1500 — the same controller family running generator management logic on many K-Chief installations — OTWarden alerts you. That's the coverage that matters. We also monitor NVD directly for any Kongsberg and Wärtsilä CVEs that do get publicly disclosed, so nothing slips through.
Why OTWarden for Maritime OT
Filtered to your fleet
Only alerts for vendors relevant to your vessel — Siemens, ABB, Yokogawa, Rockwell, and the platform layers that maritime OT systems are built on. Plus direct NVD monitoring for Kongsberg and Wärtsilä. No noise from unrelated industries.
Compliance evidence trail
Every alert is logged with timestamp, CVE IDs, CVSS score, and remediation steps. Export your alert history as a PDF audit report for ISM auditors.
Works inside the SMS
OTWarden integrates into your Safety Management System as an automated vulnerability monitoring process. No expensive Dragos or Claroty licence required.
Immediate value on sign-up
When you add your first vendor, we retroactively match against 30 days of advisories — so you see what you might have already missed.
"I spent years commissioning ships — dealing with PMS fault cascades, PLC resets mid-sea, and ECDIS bugs that turned into safety incidents. When I started investigating the root causes, I kept finding unpatched CVEs that had been sitting in the advisory databases for months. The vendors published the fixes. Nobody was watching for them."
Free 14-day trial — no card required
Add the platform vendors inside your vessel — Siemens, ABB, Yokogawa, Rockwell — and receive alerts from CISA, vendor feeds, and NVD the moment a relevant advisory is published.
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