CVE-2025-27851: The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a cross-site origin WebSocket hijac

This month

CRITICAL 9.3MITIGATE

CVE-2025-27851 is a critical-severity flaw (CVSS 9.3) affecting empirbus wireless display unit firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 Ne

Why this priority

Critical severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-352
Published	2026-05-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: garmin

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 21:16 UTCPublished CVE record published
2026-06-17 09:04 UTCUpdated Record last modified

garmin empirbus wireless display unit firmware MITIGATE

Affected: 1.4.6 · 5.00

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.4.6

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-27851?

empirbus wireless display unit firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-27851 being exploited?

CVE-2025-27851 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-27851 affect?

CVE-2025-27851 affects empirbus wireless display unit firmware. Severity is critical (CVSS 9.3). 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 n

How urgent is CVE-2025-27851?

Priority 33/100. Critical severity

Related CVEs

CVE-2025-27853 HIGH 7.3 MITIGATE The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows its authentication to be bypassed
CVE-2025-27852 MEDIUM 5.0 MITIGATE The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a reflected cross site scripting (X
CVE-2025-27850 HIGH 7.5 MITIGATE The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a symlink attack

References

← Back to latest CVEs