THREATPORT/VULNERABILITY/CVE-2026-23515
CRITICAL SEVERITY

CVE-2026-23515

Signal K Server vulnerability

CVSS
9.9
EPSS
4.2%
EPSS pct
90th
Exploited
No known
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.
Affected vendor
Signalk
Affected product
Signal K Server
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-78 — OS Command Injection
Published
2026-02-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 4.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 90% of all scored CVEs.

Check your external exposure to CVE-2026-23515

  • Confirm whether Signalk Signal K Server is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2026-23515.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-23515

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2026-23515 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2026-23515?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2026-23515.

Start free scan

No credit card. Agentless.

Related vulnerabilities

CRITICAL
CVE-2021-27102
Accellion FTA OS Command Injection Vulnerability
CRITICAL
CVE-2021-27101
Accellion FTA SQL Injection Vulnerability
CRITICAL
CVE-2021-27103
Accellion FTA Server-Side Request Forgery (SSRF) Vulnerability