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Vulnerabilities

Vulnerability · CVE-2025-63409

Privilege escalation and improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to modify administrator only settings and extract adm…

Published Feb 24, 2026 · catalog updated Jul 5, 2026 · gcom epon 1ge firmware

Check if you run it

No confirmed exploitation is on record for CVE-2025-63409. EPSS is 0.29%. Act only if a listed version of gcom epon 1ge firmware is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Advisory link
Affected products
cpe gcomtw/gcom epon 1ge firmware

Privilege escalation and improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to modify administrator only settings and extract administrator credentials.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe gcomtw/gcom epon 1ge firmwarec00r371v00b01

How to fix CVE-2025-63409

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-63409. EPSS is 0.29%. Act only if a listed version of gcom epon 1ge firmware is installed.

Which versions are affected?

Compare what you have installed with gcomtw/gcom epon 1ge firmware c00r371v00b01. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-284: Improper Access Control. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 24, 2026 · NIST NVD

    Detected

    Privilege escalation and improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to modify administrator only settings and extract administrator credentials.

  2. Jul 5, 2026 · NIST NVD

    Updated

    Privilege escalation and improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to modify administrator only settings and extract administrator credentials.

Sources

  • CVE.orgVulnerability recordCVE-2025-63409

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-63409

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2025-63409

    Privilege escalation and improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to modify administrator only settings and extract administrator credentials.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.