CVE-2025-27851
Cross-site WebSocket hijack enables full Garmin WDU control.
Is CVE-2025-27851 being exploited?
Not confirmed. CVE-2025-27851 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.
How severe is CVE-2025-27851?
CVE-2025-27851 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-27851?
Yes. A fix has been recorded for CVE-2025-27851. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-27851 affect?
CVE-2025-27851 affects Garmin WDU v1.4.6, Garmin WDU v2.5.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-27851?
Upgrade firmware when patch is released; restrict WDU admin access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker hijacks WDU WebSocket from attacker site to gain full admin control.
Patch when possible