CVE-2025-63409
Privilege escalation in GCOM EPON 1GE allows remote authenticated users to modify admin settings.
Is CVE-2025-63409 being exploited?
Not confirmed. CVE-2025-63409 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 0.28% probability of exploitation in the next 30 days.
How severe is CVE-2025-63409?
CVE-2025-63409 is rated High with a CVSS score of 8.8. 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-2025-63409?
Not known from our data. No patch reference has been recorded for CVE-2025-63409, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2025-63409 affect?
CVE-2025-63409 affects GCOM EPON 1GE C00R371V00B01. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-63409?
Apply vendor patch when released; restrict admin access; rotate credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote authenticated users can modify administrator-only settings and exfiltrate administrator credentials.
Patch when possible