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Vulnerability record · CVE-2020-13960 · published 8 June 2020

CVE-2020-13960: Dlink dsl-2730u firmware vulnerability

Dlink · Dsl 2730u Firmware

D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 devices have the domain.name string in the DNS resolver search path by default, which allows remote attackers to provide valid DNS responses (and also offer Internet services such as HTTP) for names that otherwise would have had an NXDOMAIN error, by registering a subdomain of the domain.name domain name.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.3%
7.5CVSS 3.1 base score, v2 5.0
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 devices have the domain.name string in the DNS resolver search path by default, which allows remote attackers to provide valid DNS responses (and also offer Internet services such as HTTP) for names that otherwise would have had an NXDOMAIN error, by registering a subdomain of the domain.name domain name.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://harigovind.org/articles/who-is-hijacking-my-nxdomains/ ExploitThird Party Advisory
https://harigovind.org/articles/who-is-hijacking-my-nxdomains/ ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-13101D-Link DIR-600M wan.htm missing authentication exposes and alters WAN settingsThe D-Link DIR-600M router firmware (versions 3.02, 3.03, 3.04, 3.06) allows the wan.htm page to be accessed directly without authentication. This mi…EPSS 67%analysed9.8CVE-2019-7736Dlink dir-600m firmware vulnerabilityD-Link DIR-600M C1 3.04 devices allow authentication bypass via a direct request to the wan.htm page. NOTE: this may overlap CVE-2019-13101.EPSS 2.7%8.8CVE-2017-9100D-Link DIR-600M login.cgi authentication bypass via blank passwordThe login.cgi handler on D-Link DIR-600M devices running firmware 3.04 fails to properly validate the admin password field, allowing authentication t…EPSS 85%analysed8.8CVE-2017-6411Dlink dsl-2730u firmware cross-site request forgery vulnerabilityCross Site Request Forgery (CSRF) on D-Link DSL-2730U C1 IN_1.00 devices allows remote attackers to change the DNS or firewall configuration or any p…EPSS 3.0%7.5CVE-2024-1786Dlink dir-600m firmware classic buffer overflow vulnerability** UNSUPPORTED WHEN ASSIGNED ** A vulnerability, which was classified as critical, has been found in D-Link DIR-600M C1 3.08. Affected by this issue …EPSS 2.7%6.8CVE-2023-46033Dlink dsl-2730u firmware improper access control vulnerabilityD-Link (Non-US) DSL-2750U N300 ADSL2+ and (Non-US) DSL-2730U N150 ADSL2+ are vulnerable to Incorrect Access Control. The UART/Serial interface on the…EPSS 0.33%5.4CVE-2018-16605Dlink dir-600m firmware cross-site scripting vulnerabilityD-Link DIR-600M devices allow XSS via the Hostname and Username fields in the Dynamic DNS Configuration page.EPSS 0.90%

Source: NIST National Vulnerability Database (record CVE-2020-13960), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.