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CVE-2026-23515

Signalk Signal K Server command injection

9.9 CRITICALPublic exploitEPSS 4.59%
  1. Published2 Feb 2026

Description

Signal K Server is a server application that runs on a central hub in a boat. Prior to 1.5.0, a command injection vulnerability allows authenticated users with write permissions to execute arbitrary shell commands on the Signal K server when the set-system-time plugin is enabled. Unauthenticated users can also exploit this vulnerability if security is disabled on the Signal K server. This occurs due to unsafe construction of shell commands when processing navigation.datetime values received via WebSocket delta messages. This vulnerability is fixed in 1.5.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Signalk Signal K Server< 1.5.0

Remediation

Fixed in
Signalk Signal K Server≥ 1.5.0

References

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Frequently asked

Is CVE-2026-23515 being actively exploited?

CVE-2026-23515 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 4.59%.

How severe is CVE-2026-23515?

CVE-2026-23515 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 4.59% probability of exploitation.

Which products are affected by CVE-2026-23515?

Affected products include Signalk Signal K Server.

How do I fix CVE-2026-23515?

Upgrade affected software to a fixed version, for example Signalk Signal K Server 1.5.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-23515 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.