EUVD-2026-80012
GHSA-j2xg-7hvh-hxm5
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Hard-coded key allows unauthenticated client authentication over the network (AV:N/PR:N), yielding high confidentiality and integrity but no availability impact (A:N), no scope change.
Primary rating from Vendor (hq).
CVSS VectorVendor: hq
Lifecycle Timeline
2DescriptionCVE.org
A hardcoded cryptographic client authentication key vulnerability exists in the robot testing framework component of Wärtsilä FOS-Onboard.
AnalysisAI
Unauthenticated remote attackers who possess the cryptographic client key hard-coded in the robot testing framework component of Wärtsilä FOS-Onboard 5.07.0923.01 can authenticate to that component, yielding high confidentiality and integrity impact with no availability impact and no scope change (vendor CVSS 4.0 score 9.3; independently assessed as CVSS 3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N). The key is static and compiled into the software, so anyone who extracts it via reverse engineering can impersonate a legitimate client from any network-reachable position, with no privileges or user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the robot testing framework component of Wärtsilä FOS-Onboard 5.07.0923.01, plus knowledge of the hard-coded client authentication key embedded in the software (extractable via reverse engineering). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor's CVSS 4.0 base score of 9.3 (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H) reflects a remotely reachable, unauthenticated, low-complexity flaw yielding high confidentiality and integrity impact with no availability impact (VA:N) and no scope change to subsequent systems (SC:N/SI:N/SA:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the fixed FOS-Onboard release obtained through Wärtsilä's ICS patch deployment process (https://www.wartsila.com/services-catalogue/engine-services-4-stroke/wartsila-ics-patch-deployment#contact) and review CISA advisory ICSA-26-258-02 (https://www.cisa.gov/news-events/ics-advisories/icsa-26-258-02) for the vendor-supplied mitigation package; no exact patched version number is stated in the available data, so patch status is best described as patch available per vendor advisory rather than a confirmed release identifier. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all deployments of Wärtsilä FOS-Onboard 5.07.0923.01 and determine whether the robot testing framework component is network-reachable in production; if so, isolate or disable the component immediately and enable logging for authentication attempts. …
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Same weakness CWE-321 – Use of Hard-coded Cryptographic Key
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External POC / Exploit Code
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