CVE-2020-13960: 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 resolve

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HIGH 7.5REMOTEMITIGATEMITIGATE

CVE-2020-13960 is a high-severity flaw (CVSS 7.5) affecting dsl-2730u firmware, dir-600m firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Published	2020-06-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dlink

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-06-08 20:15 UTCPublished CVE record published
2026-06-17 02:54 UTCUpdated Record last modified

dlink dsl-2730u firmware MITIGATE

Affected: in_1.10

Fixed in: no fixed release known

Safe to downgrade to: a release before in_1.10

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

dlink dir-600m firmware MITIGATE

Affected: 3.04

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-13960?

dsl-2730u firmware: mitigate or apply the listed mitigation; dir-600m firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-13960 being exploited?

CVE-2020-13960 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-13960 affect?

CVE-2020-13960 affects dsl-2730u firmware, dir-600m firmware. Severity is high (CVSS 7.5). 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 H

How urgent is CVE-2020-13960?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

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CVE-2017-6411 HIGH 8.8 MITIGATE Cross Site Request Forgery (CSRF) on D-Link DSL-2730U C1 IN_1.00 devices allows remote attackers to change the

References

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