CVE-2020-13960Known exploitationPublic exploitNetwork attack vector

DNS response hijacking via default registrable suffix

Published Jun 8, 2020 · Updated Aug 4, 2024

DNS search-path injection in D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 allows remote attackers to redirect failed lookups. The routers' DHCP service supplies the registrable domain.name suffix by default, causing clients to append it after an NXDOMAIN response. An attacker who registers a matching third-level subdomain can return valid DNS answers and direct affected clients to attacker-controlled Internet services.

CVSS severity7.5
High
EPSS probability1.19%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DNS search-path injection in D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 allows remote attackers to redirect failed lookups. The routers' DHCP service supplies the registrable domain.name suffix by default, causing clients to append it after an NXDOMAIN response. An attacker who registers a matching third-level subdomain can return valid DNS answers and direct affected clients to attacker-controlled Internet services.

The record

CVE
CVE-2020-13960
Published
Jun 8, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1583.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0NVDAV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

T1583.001Acquire Infrastructure: Domains

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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