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CVE-2018-10561

Dasan GPON Routers Authentication Bypass

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 92.9%
  1. Published4 May 2018
  2. Added to CISA KEV31 Mar 2022
  3. Remediation due21 Apr 2022
Actively exploited (CISA KEV)

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

Added to KEV: 31 Mar 2022Federal remediation due: 21 Apr 2022

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Dasannetworks Gpon Router Firmwareall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2018-10561 being actively exploited?

Yes. CVE-2018-10561 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 31 Mar 2022.

How severe is CVE-2018-10561?

CVE-2018-10561 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 92.9% probability of exploitation.

Which products are affected by CVE-2018-10561?

Affected products include Dasannetworks Gpon Router Firmware.

How do I fix CVE-2018-10561?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-10561 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.