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Findings

CVE-2018-10561

Dasan GPON Routers Authentication Bypass Vulnerability

Published May 3, 2018 · updated Jun 16, 2026 · dasannetworks gpon router firmware

An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

Timeline

Detection, updates, and resolution for this record.

  1. May 3, 2018 · Catalog

    Detected

    An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

  2. Mar 31, 2022 · CISA KEV

    Known exploited

    The impacted product is end-of-life and should be disconnected if still in use.

  3. Apr 21, 2022 · CISA KEV

    Remediation due

    The impacted product is end-of-life and should be disconnected if still in use.

  4. Jun 16, 2026 · Catalog

    Updated

    An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

Required action

The impacted product is end-of-life and should be disconnected if still in use.

CISA due date Apr 21, 2022

Affected

  • cpe dasannetworks/gpon router firmwareversion unspecified
  • vendor Dasan Gigabit Passive Optical Network (GPON) Routersversion unspecified

Sources

  • CISA KEVCVE-2018-10561

    Dasan GPON Routers contain an authentication bypass vulnerability. When combined with CVE-2018-10562, exploitation can allow an attacker to perform remote code execution.

    cisa.gov
  • CVE.orgCVE-2018-10561

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2018-10561

    30-day exploitation probability 92.8%

    first.org
  • Exploit Database44576

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • NIST NVDCVE-2018-10561

    An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the d

    nvd.nist.gov

References