CVE-2025-27851: Garmin Empirbus Wireless Display Unit Firmware

Critical severity, CVSS 9.3. EPSS: 0.1% chance of exploitation in the next 30 days.

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.

Affected products

• Garmin Empirbus Wireless Display Unit Firmware: version 1.4.6 only; version 5.00 only

Published 2026-05-13. Last modified 2026-06-17.