CVE-2018-10561: Dasan GPON Routers Authentication Bypass Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2022-03-31. EPSS: 92.9% chance of exploitation in the next 30 days.

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.

Affected products

• Dasannetworks GPON Router Firmware: affected versions not specified

Published 2018-05-04. Last modified 2026-06-17.