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Vulnerabilities

Vulnerability · CVE-2018-10561

Dasan GPON Routers Authentication Bypass Vulnerability

Published May 3, 2018 · catalog updated Jun 16, 2026 · Dasan Gigabit Passive Optical Network (GPON) Routers

Patch now

CVE-2018-10561 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Dasan Gigabit Passive Optical Network (GPON) Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
92.82%
Remediation
Remediation guidance
Affected products
cpe dasannetworks/gpon router firmware · vendor Dasan Gigabit Passive Optical Network (GPON) Routers

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.

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

How to fix CVE-2018-10561

What to do

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

Should you patch?

CVE-2018-10561 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Dasan Gigabit Passive Optical Network (GPON) Routers against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. The impacted product is end-of-life and should be disconnected if still in use.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 92.82%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

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

No public source repository is identified for this product.

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.

Sources

  • CISA KEVConfirmed exploitationCVE-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.orgVulnerability recordCVE-2018-10561

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-10561

    30-day exploitation probability 92.8%

    first.org
  • Exploit DatabasePublic exploit reference44576

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

    exploit-db.com
  • NIST NVDVulnerability recordCVE-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
  • VulnCheck KEVConfirmed exploitationCVE-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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.