CVEs / CVE-2018-10561

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

Known exploited in the CISA KEV catalog since 31 Mar 2022
critical 9.8 CVSS 3.1 (NVD)
EPSS 92.8% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

Dasan GPON Routers contain an authentication bypass vulnerability. When combined with CVE-2018-10562, exploitation can allow an attacker to perform remote code execution.
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 4 May 2018 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

Exploitation

In CISA KEV since	31 Mar 2022
Due date for US federal agencies	21 Apr 2022
Used in ransomware campaigns	Unknown
Required action	The impacted product is end-of-life and should be disconnected if still in use.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-287

References

CVE-2018-10561 on NVD
CVE-2018-10561 in the CISA KEV catalog
http://www.securityfocus.com/bid/107053 Broken Link, Third Party Advisory, VDB Entry
https://www.exploit-db.com/exploits/44576/ Exploit, Third Party Advisory, VDB Entry
https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/ Exploit, Technical Description, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-10561 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.