CVE-2026-81855 Wärtsilä FOS-Onboard - Authentication Bypass

Wärtsilä FOS-Onboard contains a hardcoded cryptographic client authentication key vulnerability in the robot testing framework component, letting attackers potentially bypass authentication, exploit requires no special conditions.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.59% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-321

Vendor fix

Update to the latest version with fixed cryptographic key management.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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