CVE-2018-10561
CRITICALCISA KEVEPSS 100th pctlDescription
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 to fix
No fix available - end of life
This product no longer receives security updates. CISA advises disconnecting affected systems if still in use.
CISA required action: The impacted product is end-of-life and should be disconnected if still in use.
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
Dasan GPON Routers Authentication Bypass Vulnerability
Dasan GPON Routers contain an authentication bypass vulnerability. When combined with CVE-2018-10562, exploitation can allow an attacker to perform remote code execution.
The impacted product is end-of-life and should be disconnected if still in use.
Remediation due: 2022-04-21
References
Related Vulnerabilities
Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-35082 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2023-35078 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
| CVE-2017-7921 | Critical | 9.8 | 100% | KEV | - |
| CVE-2024-7593 | Critical | 9.8 | 100% | KEV | - |
| CVE-2023-46805 | High | 8.2 | 100% | KEV + Ransom | - |
| CVE-2022-40684 | Critical | 9.8 | 100% | KEV + Ransom | Fix |
Common questions
How do I fix CVE-2018-10561?
CVE-2018-10561 affects an end-of-life product with no vendor fix. CISA advises disconnecting affected systems.
Is CVE-2018-10561 being actively exploited?
Yes. CVE-2018-10561 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2022-04-21. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2018-10561?
CVE-2018-10561 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-05.