CVE-2018-10561

Name: CVE-2018-10561
Creator: NVD / NIST
Published: 2018-05-04T03:29:00.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 93.32%

Last modified Jun 17, 2026

CVE-2018-10561 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 93.32% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

93.32%

99.8th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Apr 21, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dasannetworks	Gpon Router Firmware	All versions

References

http://www.securityfocus.com/bid/107053Broken 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
http://www.securityfocus.com/bid/107053Broken 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-2018-10561US Government Resource

Timeline

Published: May 4, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-10561?

How severe is CVE-2018-10561?

CVE-2018-10561 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 93.32% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-10561?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-10561?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST