How severe is CVE-2026-25228?

CVE-2026-25228 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-25228 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25228?

CVE-2026-25228 affects Signalk Signal K Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25228?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25228 have an EU (EUVD) identifier?

Yes. CVE-2026-25228 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5343.

When was CVE-2026-25228 published?

CVE-2026-25228 was published on 2026-02-02 and last updated on 2026-06-17.

CVE-2026-25228

CVE-2026-25228 is a medium-severity vulnerability in Signalk Signal K Server with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5343
Weakness: CWE-22
Affected product: Signalk Signal K Server
Published: 2026-02-02
Last modified: 2026-06-17

Description

Signal K Server is a server application that runs on a central hub in a boat. Prior to 2.20.3, a path traversal vulnerability in SignalK Server's applicationData API allows authenticated users on Windows systems to read, write, and list arbitrary files and directories on the filesystem. The validateAppId() function blocks forward slashes (/) but not backslashes (\), which are treated as directory separators by path.join() on Windows. This enables attackers to escape the intended applicationData directory. This vulnerability is fixed in 2.20.3.

Frequently asked questions

What is CVE-2026-25228?: Signal K Server is a server application that runs on a central hub in a boat. Prior to 2.20.3, a path traversal vulnerability in SignalK Server's applicationData API allows authenticated users on Windows systems to read, write, and list arbitrary files and directories on the filesystem. The validateAppId() function blocks forward slashes (/) but not backslashes (\), which are treated as directory separators by path.join() on Windows. This enables attackers to escape the intended applicationData directory. This vulnerability is fixed in 2.20.3.
How severe is CVE-2026-25228?: CVE-2026-25228 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-25228 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25228?: CVE-2026-25228 affects Signalk Signal K Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25228?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25228 have an EU (EUVD) identifier?: Yes. CVE-2026-25228 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5343.
When was CVE-2026-25228 published?: CVE-2026-25228 was published on 2026-02-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:signalk:signal_k_server:*:*:*:*:*:*:*:*

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