CVE-2025-29524Public exploitNetwork attack vector

Low-privilege administrator function access via direct URLs

Published Aug 25, 2025 · Updated Aug 26, 2025

Improper access control in DASAN GPON ONU H660WM H660WMR210825 allows remote authenticated users to access administrator APIs. The web interface hides diagnostic and device-information pages from low-privileged accounts, but direct requests to /cgi-bin/system_diagnostic_main.asp and related URLs still invoke their administrator functions. A low-privileged account and network reachability to the device are required; exposed functions include system diagnostics and device information.

CVSS severity6.5
Medium
EPSS probability0.33%
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 DASAN GPON ONU H660WM H660WMR210825 allows remote authenticated users to access administrator APIs. The web interface hides diagnostic and device-information pages from low-privileged accounts, but direct requests to /cgi-bin/system_diagnostic_main.asp and related URLs still invoke their administrator functions. A low-privileged account and network reachability to the device are required; exposed functions include system diagnostics and device information.

The record

CVE
CVE-2025-29524
Published
Aug 25, 2025
Updated
Aug 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-284, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 26, 2025Record 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

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1210Exploitation of Remote Services

Public exploit references

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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