CVE-2025-71056Network attack vector

Administrative session hijacking via IP address spoofing

Published Feb 23, 2026 · Updated Feb 23, 2026

Authentication bypass in GCOM EPON 1GE ONU C00R371V00B01 allows remote attackers to hijack an authenticated web session. The web management interface issues no session token or cookie and treats the client source IP address as the authenticated identity. An attacker on the local network must spoof or share an authenticated user's IP address, which grants full administrative interface access and arbitrary administrative actions.

CVSS severity8.1
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in GCOM EPON 1GE ONU C00R371V00B01 allows remote attackers to hijack an authenticated web session. The web management interface issues no session token or cookie and treats the client source IP address as the authenticated identity. An attacker on the local network must spoof or share an authenticated user's IP address, which grants full administrative interface access and arbitrary administrative actions.

The record

CVE
CVE-2025-71056
Published
Feb 23, 2026
Updated
Feb 23, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-290
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-290Authentication Bypass by Spoofing

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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