CVE-2025-27851

Cross‑Site WebSocket Hijacking in Garmin WDU Firmware

Published May 13, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Garmin empirbus Wireless Display Unit
Garmin empirbus Wireless Display Unit Firmware
CPEs cpe:2.3:h:garmin:empirbus_wireless_display_unit:v1:*:*:*:*:*:*:*
cpe:2.3:h:garmin:empirbus_wireless_display_unit:v2:*:*:*:*:*:*:*
cpe:2.3:o:garmin:empirbus_wireless_display_unit_firmware:1.4.6:*:*:*:*:*:*:*
cpe:2.3:o:garmin:empirbus_wireless_display_unit_firmware:5.00:*:*:*:*:*:*:*
Vendors & Products Garmin empirbus Wireless Display Unit
Garmin empirbus Wireless Display Unit Firmware
Type Values Removed Values Added
Title Cross‑Site WebSocket Hijacking in Garmin WDU Firmware
Type Values Removed Values Added
Title WebSocket Hijacking Exploit Enables Full Control of Garmin WDU
Weaknesses CWE-1030
CWE-307
Type Values Removed Values Added
Weaknesses CWE-352
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Garmin
Garmin wdu
Vendors & Products Garmin
Garmin wdu
Type Values Removed Values Added
Title WebSocket Hijacking Exploit Enables Full Control of Garmin WDU
Weaknesses CWE-1030
CWE-307
Type Values Removed Values Added
Description 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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 14, 2026, 3:35 PM
Reserved
Mar 9, 2025, 12:00 AM
Status
Analyzed
Published
May 13, 2026, 9:16 PM
Modified
Nov 4, 2026, 8:10 PM