CVE DATABASE / CVE-2018-10561
CVE-2018-10561
Dasan GPON Routers Authentication Bypass Vulnerability
Confirmed exploited in the wild. Added 2022-03-31.
Federal remediation due 2022-04-21.
Required action: The impacted product is end-of-life and should be disconnected if still in use.
Summary
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
| Base score | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
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References
- http://www.securityfocus.com/bid/107053
- https://www.exploit-db.com/exploits/44576/
- https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-10561
Data: NIST NVD + CISA KEV. NVD last modified 2025-11-05. Always verify against the vendor advisory before acting.