How severe is CVE-2025-27851?

CVE-2025-27851 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2025-27851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27851?

CVE-2025-27851 primarily affects Garmin Empirbus Wireless Display Unit Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-27851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-27851 have an EU (EUVD) identifier?

Yes. CVE-2025-27851 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209829.

When was CVE-2025-27851 published?

CVE-2025-27851 was published on 2026-05-13 and last updated on 2026-06-17.

CVE-2025-27851

CVE-2025-27851 is a critical-severity vulnerability in Garmin Empirbus Wireless Display Unit Firmware with a CVSS 3.x base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: Critical (CVSS 3.x base score 9.3)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209829
Weakness: CWE-352
Affected product: Garmin Empirbus Wireless Display Unit Firmware
Published: 2026-05-13
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2025-27851?: CVE-2025-27851 has a CVSS 3.x base score of 9.3, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2025-27851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27851?: CVE-2025-27851 primarily affects Garmin Empirbus Wireless Display Unit Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-27851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-27851 have an EU (EUVD) identifier?: Yes. CVE-2025-27851 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209829.
When was CVE-2025-27851 published?: CVE-2025-27851 was published on 2026-05-13 and last updated on 2026-06-17.

References

Affected products (2)

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:*:*:*:*:*:*:*

More vulnerabilities in Garmin Empirbus Wireless Display Unit Firmware

CVE-2025-27850 — High (CVSS 7.5): The locally served web site on the Garmin WDU (v1 1.4.6 and v2 5.0) allows a symlink attack. If a malicious graphics…
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