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

> CVE-2018-10561: Dasan GPON Routers Authentication Bypass Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-10561
Last updated: 2025-10-21T23:45:51Z

- Published: 2018-05-04 03:00 UTC · Updated: 2025-10-21 23:45 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 92.8%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-31, federal due date 2022-04-21, ransomware use: Unknown

## 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.

## CISA required action

The impacted product is end-of-life and should be disconnected if still in use.

## Affected vendors and products

- Dasan: Gigabit Passive Optical Network (GPON) Routers

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-10561)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-10561)
- [https://www.exploit-db.com/exploits/44576/](https://www.exploit-db.com/exploits/44576/)
- [https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/](https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/)
- [http://www.securityfocus.com/bid/107053](http://www.securityfocus.com/bid/107053)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-10561 · Markdown: https://rewindex.com/cve/CVE-2018-10561.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-10561 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T01:59:15.600Z