CVE-2025-63409Network attack vector

Administrative takeover via missing role enforcement

Published Feb 24, 2026 · Updated Feb 24, 2026

Improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to gain full administrative control. The web UI and configuration API omit role enforcement for administrator-only settings, while the backup feature returns an unencrypted configuration containing the administrator password. A low-privileged User account can change restricted settings and download the backup, exposing credentials that grant full device administration.

CVSS severity8.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in GCOM EPON 1GE C00R371V00B01 allows remote authenticated users to gain full administrative control. The web UI and configuration API omit role enforcement for administrator-only settings, while the backup feature returns an unencrypted configuration containing the administrator password. A low-privileged User account can change restricted settings and download the backup, exposing credentials that grant full device administration.

The record

CVE
CVE-2025-63409
Published
Feb 24, 2026
Updated
Feb 24, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1552.001, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1552.001Unsecured Credentials: Credentials In Files
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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