Wärtsilä FOS-Onboard Use of Hard-coded Cryptographic Key
Priority MEDIUM 49CWE-321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-321.
Summary
A hardcoded cryptographic client authentication key vulnerability exists in the robot testing framework component of Wärtsilä FOS-Onboard.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00589 48th percentileScored 2026-11-07
Fix Fixed FOS-Onboard (Wärtsilä): 5.08.4052.01
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA FOS-Onboard (Wärtsilä) Fixed in 5.08.4052.01
Timeline
- 2026-10-02 Threatist record created from CVE-2026-81855
- 2026-10-03 Alias added: GHSA-j2xg-7hvh-hxm5
References
More Wärtsilä vulnerabilities
- TI-2026-54406 Wärtsilä FOS-Onboard Use of Hard-coded Cryptographic Key CVSS 4.0CRITICAL 9.5
Sources
- CVE-2026-81855 · CVE Program
- CVE-2026-81855 · NVD
- FIRST EPSS
- GHSA-j2xg-7hvh-hxm5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences