Vulnerability-Lookup

ICSA-26-258-02

Vulnerability from csaf_cisa - Published: 2026-09-15 06:00 - Updated: 2026-09-15 06:00

Summary

Wärtsilä FOS-Onboard

Notes

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).

Advisory Summary: Successful exploitation of these vulnerabilities could allow an attacker to deliver an unauthorized update, execute code, or extract credentials to allow the attacker to impersonate a privileged client.

Critical infrastructure sectors: Transportation Systems

Countries/areas deployed: Worldwide

Company headquarters location: Finland

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.

Recommended Practices: CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

Recommended Practices: 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.

Recommended Practices: CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Recommended Practices: 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.

Recommended Practices: Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

Recommended Practices: 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.

Recommended Practices: No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.

CVE-2026-78225

9.0 (Critical)


                
                  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-321 - Use of Hard-coded Cryptographic Key

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Wärtsilä FOS-Onboard: 5.07.0923.01 Wärtsilä / FOS-Onboard		5.07.0923.01	Mitigation fix

CVE-2026-81855

9.1 (Critical)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE-321 - Use of Hard-coded Cryptographic Key

Affected products

Known affected 1 product, the same list as for CVE-2026-78225

References

20 references

URL	Category
https://raw.githubusercontent.com/cisagov/CSAF/de…	self
https://www.cisa.gov/news-events/ics-advisories/i…	self
https://www.cisa.gov/uscert/ics/alerts/ICS-ALERT-…	external
https://www.cisa.gov/resources-tools/resources/ic…	external
https://www.cisa.gov/sites/default/files/publicat…	external
https://www.cisa.gov/topics/industrial-control-systems	external
https://www.cisa.gov/uscert/sites/default/files/p…	external
https://www.cisa.gov/uscert/ncas/tips/ST04-014	external
https://www.cisa.gov/news-events/ics-alerts/ics-a…	external
https://www.cisa.gov/sites/default/files/recommen…	external
https://www.cisa.gov/news-events/news/targeted-cy…	external
https://www.cisa.gov/secure-our-world/teach-emplo…	external
https://www.cisa.gov/news-events/news/avoiding-so…	external
https://cwe.mitre.org/data/definitions/321.html	external
https://www.cve.org/CVERecord?id=CVE-2026-78225	external
https://www.first.org/cvss/calculator/3.1#CVSS:3.…	external
https://www.first.org/cvss/calculator/4.0#CVSS:4.…	external
https://www.cve.org/CVERecord?id=CVE-2026-81855	external
https://www.first.org/cvss/calculator/3.1#CVSS:3.…	external
https://www.first.org/cvss/calculator/4.0#CVSS:4.…	external

Acknowledgments

Cydome Security Ltd

JSON

To clipboard

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  "document": {
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        "summary": "reported these vulnerabilities to W\u00e4rtsil\u00e4 and CISA"
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        "text": "Transportation Systems",
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      },
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      },
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        "text": "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.",
        "title": "Recommended Practices"
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      {
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        "text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "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.",
        "title": "Recommended Practices"
      },
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        "category": "general",
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        "title": "Recommended Practices"
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        "text": "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.",
        "title": "Recommended Practices"
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        "title": "Recommended Practices"
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        "title": "Recommended Practices"
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        "category": "external",
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        "url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
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    "title": "W\u00e4rtsil\u00e4 FOS-Onboard",
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        "id": "CWE-321",
        "name": "Use of Hard-coded Cryptographic Key"
      },
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        {
          "category": "summary",
          "text": "A hardcoded cryptographic server key vulnerability exists in the deployer-ng Update Controller component of W\u00e4rtsil\u00e4 FOS-Onboard. ",
          "title": "Vulnerability Summary"
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          "title": "Vulnerability Summary"
        },
        {
          "category": "details",
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        },
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          "products": [
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    }
  ]
}

CVE-2026-78225 (GCVE-0-2026-78225)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:29 – Updated: 2026-09-16 18:05

Title

Wärtsilä FOS-Onboard Use of Hard-coded Cryptographic Key

Summary

A hardcoded cryptographic server key vulnerability exists in the deployer-ng Update Controller component of Wärtsilä FOS-Onboard.

Severity

9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

9.5 (Critical)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 18:05 UTC

CWE

CWE-321

Assigner

icscert icscert root

References

3 references

URL	Tags
https://www.wartsila.com/services-catalogue/engin…
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

1 product

Vendor	Product	Version
Wärtsilä	FOS-Onboard	Affected: 5.07.0923.01

Credits

Cydome Security Ltd reported this vulnerability to Wärtsilä and CISA.

Show details on NVD website

JSON

To clipboard

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CVE-2026-81855 (GCVE-0-2026-81855)

Vulnerability from cvelistv5 – Published: 2026-09-15 21:31 – Updated: 2026-09-16 18:05

Title

Wärtsilä FOS-Onboard Use of Hard-coded Cryptographic Key

Summary

A hardcoded cryptographic client authentication key vulnerability exists in the robot testing framework component of Wärtsilä FOS-Onboard.

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 18:05 UTC

CWE

CWE-321

Assigner

icscert icscert root

References

3 references

URL	Tags
https://www.wartsila.com/services-catalogue/engin…
https://www.cisa.gov/news-events/ics-advisories/i…
https://github.com/cisagov/CSAF/blob/develop/csaf…

Impacted products

1 product

Vendor	Product	Version
Wärtsilä	FOS-Onboard	Affected: 5.07.0923.01

Credits

Cydome Security Ltd reported this vulnerability to Wärtsilä and CISA.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

ICSA-26-258-02

CVE-2026-78225 (GCVE-0-2026-78225)

CVE-2026-81855 (GCVE-0-2026-81855)

Tags

Sightings

Nomenclature

Related by attack behaviour