How severe is CVE-2018-10561?

CVE-2018-10561 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-10561 being actively exploited?

Yes. CVE-2018-10561 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-31, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2018-10561?

CVE-2018-10561 affects Dasannetworks Gpon Router Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-10561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2018-10561 have an EU (EUVD) identifier?

Yes. CVE-2018-10561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-2633. It is also flagged as exploited in the EUVD (since 2022-03-31).

When was CVE-2018-10561 published?

CVE-2018-10561 was published on 2018-05-04 and last updated on 2026-06-17.

CVE-2018-10561

CVE-2018-10561 is a critical-severity vulnerability in Dasannetworks Gpon Router Firmware with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-31). The underlying weakness is classified as CWE-287.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 93% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-31)
EU (EUVD) id: EUVD-2018-2633
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-31)
Weakness: CWE-287
Affected product: Dasannetworks Gpon Router Firmware
Published: 2018-05-04
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-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 device.
How severe is CVE-2018-10561?: CVE-2018-10561 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-10561 being actively exploited?: Yes. CVE-2018-10561 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-31, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2018-10561?: CVE-2018-10561 affects Dasannetworks Gpon Router Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-10561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2018-10561 have an EU (EUVD) identifier?: Yes. CVE-2018-10561 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-2633. It is also flagged as exploited in the EUVD (since 2022-03-31).
When was CVE-2018-10561 published?: CVE-2018-10561 was published on 2018-05-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dasannetworks:gpon_router_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Dasannetworks Gpon Router Firmware

CVE-2018-10562 — Critical (CVSS 9.8): An issue was discovered on Dasan GPON home routers. Command Injection can occur via the dest_host parameter in a…

All CVEs affecting Dasannetworks Gpon Router Firmware →

Other CWE-287 (Improper Authentication) vulnerabilities

CVE-2026-45480 — Critical (CVSS 10.0): Improper authentication in Azure Active Directory allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-46389 — Critical (CVSS 10.0): UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS…
CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

Browse all CWE-287 (Improper Authentication) vulnerabilities →