CVE-2025-27851

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-13. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a cross-site origin WebSocket hijacking attack. Among other uses, the WDU utilizes WebSockets to control settings, including administrative settings. This allows a network attacker to take full control of a WDU. To initiate an exploit of this vulnerability, the victim must (1) be utilizing a web browser on a multihomed host that has local interfaces on the Garmin Marine Network as well as another network, and (2) access a malicious third party website created by the attacker.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

May 13, 2026

Last Modified

June 2, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Garmin: EmpirBus WDUv2 Change History

https://www8.garmin.com/support/ch.jsp?product=010-02642-00
generic

Garmin Official Site

https://garmin.com

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 37× 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 331 total refreshes for this CVE.

  1. 2026-09-13 16:46 UTCEPSS rescore
  2. 2026-09-12 15:00 UTCEPSS rescore
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-11 09:35 UTCEPSS rescore
  5. 2026-09-10 09:33 UTCEPSS rescore
  6. 2026-09-07 16:00 UTCEPSS rescore
  7. 2026-09-06 13:46 UTCEPSS rescore
  8. 2026-09-06 13:46 UTCEPSS rescore
  9. 2026-09-04 05:05 UTCEPSS rescore
  10. 2026-09-02 14:11 UTCEPSS rescore
  11. 2026-09-01 13:53 UTCEPSS rescore
  12. 2026-08-30 19:16 UTCEPSS rescore
  13. 2026-08-30 19:16 UTCEPSS rescore
  14. 2026-08-30 01:21 UTCEPSS rescore
  15. 2026-08-28 21:40 UTCEPSS rescore
  16. 2026-08-27 14:24 UTCEPSS rescore
  17. 2026-08-26 14:45 UTCEPSS rescore
  18. 2026-08-25 13:48 UTCEPSS rescore
  19. 2026-08-24 14:16 UTCEPSS rescore
  20. 2026-08-24 00:19 UTCGHSA enrichment
  21. 2026-08-23 17:49 UTCEG score recompute
  22. 2026-08-23 17:49 UTCGHSA enrichment
  23. 2026-08-23 00:18 UTCEPSS rescore
  24. 2026-08-22 02:03 UTCEG score recompute
  25. 2026-08-22 02:03 UTCGHSA enrichment
Show 75 more
  1. 2026-08-21 23:48 UTCEPSS rescore
  2. 2026-08-20 19:47 UTCEG score recompute
  3. 2026-08-20 19:47 UTCGHSA enrichment
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:47 UTCEPSS rescore
  6. 2026-08-17 14:52 UTCEG score recompute
  7. 2026-08-17 14:52 UTCGHSA enrichment
  8. 2026-08-17 13:46 UTCEPSS rescore
  9. 2026-08-17 10:30 UTCEG score recompute
  10. 2026-08-17 10:29 UTCGHSA enrichment
  11. 2026-08-16 14:55 UTCEPSS rescore
  12. 2026-08-16 12:45 UTCGHSA enrichment
  13. 2026-08-16 08:23 UTCGHSA enrichment
  14. 2026-08-16 04:01 UTCEG score recompute
  15. 2026-08-16 04:01 UTCGHSA enrichment
  16. 2026-08-16 02:13 UTCEPSS rescore
  17. 2026-08-15 01:29 UTCEPSS rescore
  18. 2026-08-15 00:20 UTCGHSA enrichment
  19. 2026-08-14 19:58 UTCGHSA enrichment
  20. 2026-08-14 15:36 UTCGHSA enrichment
  21. 2026-08-14 11:14 UTCGHSA enrichment
  22. 2026-08-14 06:52 UTCGHSA enrichment
  23. 2026-08-14 02:29 UTCEG score recompute
  24. 2026-08-14 02:29 UTCGHSA enrichment
  25. 2026-08-13 21:59 UTCEPSS rescore
  26. 2026-08-13 09:18 UTCGHSA enrichment
  27. 2026-08-13 04:55 UTCGHSA enrichment
  28. 2026-08-13 00:33 UTCGHSA enrichment
  29. 2026-08-12 20:11 UTCGHSA enrichment
  30. 2026-08-12 15:48 UTCEG score recompute
  31. 2026-08-12 15:48 UTCGHSA enrichment
  32. 2026-08-12 13:50 UTCEPSS rescore
  33. 2026-08-12 00:11 UTCGHSA enrichment
  34. 2026-08-11 19:49 UTCGHSA enrichment
  35. 2026-08-11 15:27 UTCEG score recompute
  36. 2026-08-11 15:27 UTCGHSA enrichment
  37. 2026-08-11 09:48 UTCGHSA enrichment
  38. 2026-08-11 05:17 UTCGHSA enrichment
  39. 2026-08-11 00:55 UTCEG score recompute
  40. 2026-08-11 00:55 UTCGHSA enrichment
  41. 2026-08-10 23:59 UTCEPSS rescore
  42. 2026-08-10 12:59 UTCGHSA enrichment
  43. 2026-08-10 08:37 UTCGHSA enrichment
  44. 2026-08-10 04:15 UTCGHSA enrichment
  45. 2026-08-09 23:53 UTCGHSA enrichment
  46. 2026-08-09 19:31 UTCGHSA enrichment
  47. 2026-08-09 15:09 UTCEG score recompute
  48. 2026-08-09 15:09 UTCGHSA enrichment
  49. 2026-08-09 13:45 UTCEPSS rescore
  50. 2026-08-09 10:47 UTCGHSA enrichment
  51. 2026-08-09 06:15 UTCGHSA enrichment
  52. 2026-08-09 01:53 UTCGHSA enrichment
  53. 2026-08-08 13:30 UTCGHSA enrichment
  54. 2026-08-08 09:08 UTCGHSA enrichment
  55. 2026-08-08 04:46 UTCGHSA enrichment
  56. 2026-08-08 00:24 UTCGHSA enrichment
  57. 2026-08-07 20:02 UTCEG score recompute
  58. 2026-08-07 20:02 UTCGHSA enrichment
  59. 2026-08-07 16:26 UTCEPSS rescore
  60. 2026-08-07 15:39 UTCGHSA enrichment
  61. 2026-08-07 11:17 UTCGHSA enrichment
  62. 2026-08-07 06:55 UTCGHSA enrichment
  63. 2026-08-07 01:22 UTCGHSA enrichment
  64. 2026-08-06 19:42 UTCGHSA enrichment
  65. 2026-08-06 15:20 UTCEG score recompute
  66. 2026-08-06 15:20 UTCGHSA enrichment
  67. 2026-08-06 13:46 UTCEPSS rescore
  68. 2026-08-06 10:47 UTCGHSA enrichment
  69. 2026-08-06 06:24 UTCGHSA enrichment
  70. 2026-08-06 02:02 UTCGHSA enrichment
  71. 2026-08-05 21:40 UTCEG score recompute
  72. 2026-08-05 21:40 UTCGHSA enrichment
  73. 2026-08-05 19:16 UTCEPSS rescore
  74. 2026-08-04 10:37 UTCEPSS rescore
  75. 2026-08-04 03:57 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2025-27851?
CVE-2025-27851 is a critical vulnerability published on May 13, 2026. The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a cross-site origin WebSocket hijacking attack. Among other uses, the WDU utilizes WebSockets to control settings, including administrative settings. This allows a network attacker to take full control of a WDU. To initiate…
When was CVE-2025-27851 disclosed?
CVE-2025-27851 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-27851 actively exploited?
CVE-2025-27851 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.9% of all scored CVEs.
What is the CVSS score of CVE-2025-27851?
CVE-2025-27851 has a CVSS v3.1 base score of 9.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2025-27851?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-27851, 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.

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