CVE-2026-78225Network attack vector

Code execution via hardcoded update server key

Published Sep 15, 2026 · Updated Sep 15, 2026

Hardcoded server key use in the deployer-ng Update Controller in Wärtsilä FOS-Onboard 5.07.0923.01 allows remote attackers to execute code. The component embeds an unchangeable cryptographic server key, enabling forged update-server authentication and acceptance of an unauthorized update. Network reachability and a deployment outside Wärtsilä's recommended configuration are required; a forged update can run attacker-controlled code.

CVSS severity9.0
Critical
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardcoded server key use in the deployer-ng Update Controller in Wärtsilä FOS-Onboard 5.07.0923.01 allows remote attackers to execute code. The component embeds an unchangeable cryptographic server key, enabling forged update-server authentication and acceptance of an unauthorized update. Network reachability and a deployment outside Wärtsilä's recommended configuration are required; a forged update can run attacker-controlled code.

The record

CVE
CVE-2026-78225
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Wärtsilä
Product
FOS-Onboard
Classifications
CWE-321, T0862
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.07.0923.01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wärtsilä · FOS-Onboardversion=5.07.0923.01

Published CVSS scores

9.0CISACVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
9.5CISACVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-321Use of Hard-coded Cryptographic Key
T0862Supply Chain Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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