CVE-2026-23515

CRITICALNVD 8.89.9▲
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 4.2%, top 10% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
9.9(medium)
EG Risk
61(Track*)
EG Risk 61/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
4%
EPSS %ILE
90%
KEV
Not listed

Published

February 2, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jul 27, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

RCE - Command Injection in Signal K set-system-time plugin · Advisory · SignalK/signalk-server · GitHub

https://github.com/SignalK/signalk-server/security/advisories/GHSA-p8gp-2w28-mhwg
github_commit

commit 75b11eae2de5 (SignalK/set-system-time)

Fix landed in SignalK/set-system-time commit 75b11eae2de5 — awaiting tagged release

https://github.com/SignalK/set-system-time/commit/75b11eae2de528bf89ede3fb1f7ed057ddbb4d24

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@signalk/set-system-time—1.5.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 101 total refreshes for this CVE.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-25 14:17 UTCEPSS rescore
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  7. 2026-07-23 14:18 UTCEPSS rescore
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  9. 2026-07-23 03:07 UTCEG score recompute
  10. 2026-07-22 14:08 UTCEPSS rescore
  11. 2026-07-21 15:24 UTCEPSS rescore
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  13. 2026-07-20 17:08 UTCEPSS rescore
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  24. 2026-07-15 02:00 UTCEPSS rescore
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  1. 2026-07-13 22:30 UTCEPSS rescore
  2. 2026-07-13 18:38 UTCOSV refresh
  3. 2026-07-13 06:13 UTCEPSS rescore
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  5. 2026-07-12 05:46 UTCEPSS rescore
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  20. 2026-06-30 23:22 UTCEPSS rescore
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  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 03:08 UTCEPSS rescore
  26. 2026-06-25 16:16 UTCOSV refresh
  27. 2026-06-25 13:49 UTCEPSS rescore
  28. 2026-06-25 13:49 UTCEPSS rescore
  29. 2026-06-24 14:05 UTCEPSS rescore
  30. 2026-06-24 14:05 UTCEPSS rescore
  31. 2026-06-23 21:33 UTCEPSS rescore
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  35. 2026-06-21 14:56 UTCEPSS rescore
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  39. 2026-06-19 19:25 UTCEPSS rescore
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  41. 2026-06-18 17:52 UTCEPSS rescore
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  44. 2026-06-16 17:52 UTCEPSS rescore
  45. 2026-06-15 17:48 UTCEPSS rescore
  46. 2026-06-14 23:18 UTCEPSS rescore
  47. 2026-06-13 23:00 UTCEPSS rescore
  48. 2026-06-12 23:12 UTCEPSS rescore
  49. 2026-06-12 23:12 UTCEPSS rescore
  50. 2026-06-11 14:00 UTCEPSS rescore
  51. 2026-06-10 22:18 UTCEPSS rescore
  52. 2026-06-10 22:18 UTCEPSS rescore
  53. 2026-06-10 13:22 UTCEPSS rescore
  54. 2026-06-08 14:17 UTCEPSS rescore
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  56. 2026-06-07 15:25 UTCEPSS rescore
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  58. 2026-06-06 13:47 UTCEPSS rescore
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  64. 2026-06-04 13:12 UTCEPSS rescore
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  67. 2026-06-02 20:13 UTCEPSS rescore
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  69. 2026-05-31 22:30 UTCEPSS rescore
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  71. 2026-05-31 00:16 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-31 00:16 UTCEPSS rescore
  74. 2026-05-29 14:52 UTCEG score recompute
  75. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23515?
CVE-2026-23515 is a critical vulnerability published on February 2, 2026. 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…
When was CVE-2026-23515 disclosed?
CVE-2026-23515 was first published in the National Vulnerability Database on February 2, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23515 actively exploited?
CVE-2026-23515 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 10.2% of all scored CVEs.
What is the CVSS score of CVE-2026-23515?
CVE-2026-23515 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.9.
How do I remediate CVE-2026-23515?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23515, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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